i degrade 12s and welcome to today's video in which we are going to be just going through the theory modules now i have already put out a video dealing with a theory test that covers term one which is module 1.1 to 1.4 so i'm going to be going through those modules now and when you latch up the two you'll be fully prepared not just for term one but when you are in term two or term three and you're looking to revise on these terms this is gonna be an awesome resource for you so let's get started all right so again i'm not going to go through explaining every single detail but rather i'm just going to touch on some of the big things and you know possible questions that usually come up on these topics okay so module 1.1 we look at why we use computers okay you need to know those three things you need to know the fact that we use computers because they are more efficient they are more accurate they are more reliable but think of it in the broader sense as well not just computers but i t as a whole remember we're talking about ict so the fact that they save time labor resources we can pop in mass production as well this is what machines have helped us to do and then there's obviously the reliability that goes with that it's also improved communication think about 20 30 years ago how were people communicating 50 years ago how were people communicating and how are they doing it now now you're finding that people in fact the world has become a lot smaller because we are able to interact with each other no matter where we are in the world okay so you've got communication costs that are saved you know etc then we've got the different types of computer systems but when we go into this the first thing they always touch on is basically what you need to know before buying or comparing computers and remember when we talk about computers we're talking about laptops desktops notebooks smartphones tablets we're talking about all of those devices so when we are looking at buying one when they give us a scenario to ask should the person be buying this particular machine they'll give us a scenario tell us what the person is going to be doing with it and that is of the utmost importance because what is it going to be used for determines everything guys if you're going to be buying a laptop that is for gaming then what do you need you need specialized hardware you know you need a particular operating system you know you need a certain amount of ram if you're just going to be doing you know sort of basic things at home again that will also determine the hardware that you will buy so these are important questions to ask and if it does come up in the scenario with us you'll know how to answer it all right then we deal with non-portable computers so these are computers that are large in size they are not meant to be moved around they are generally more powerful than their than their portable counterparts but the portable ones have an all-in-one design so when we talk about all in one we're talking about your laptop the fact that your monitor your keyboard your mouse it's all built into one device all right with your non-portable computers examples of things like your desktops and your servers and then very importantly and maybe let me just move myself out of the way here we also have the entry-level computer now this is something that has been asked before what is an entry-level computer so it's either going to be two or three marks right for this first thing you need to say is it's the cheapest computer to purchase in a range right in that particular range it is going to be the cheapest one to buy it's also got lower hardware specifications so already there we have two but if it's gonna be three marks you will have to add the software the fact that it comes with home edition software okay so the hardware is the lowest spec in that range or it's the cheapest in that range the hardware specs are the lowest and even the software is on the lower end of the scale that is an entry-level computer in other words the most basic one that you can get in that range right moving on then we have portable computers we know it's got an all-in-one design you know it's got your keyboard mouse everything in it folds away like your laptop so when you think portable just think of your laptop right laptop notebook chromebook you know any of these um smartphones and phablets and tablets will also fall into that very importantly then we have our categories of users and you need to know the different users especially where you are going to be facing questions dealing with scenarios okay so we have the personal user you can see the personal user really uses the pc for the absolute basic things all right absolute basic things so we've got limited office tasks not even the kind of things you're doing in cat right limited office tasks here we've got our soho user this is a person that is using the pc for a little home office could be something small it's generally something small not big you know office work you know hardware intensive nothing like that because look at what they say they'll generally use an entry-level computer and we know that's on the lowest pick of software and hardware and it's cheap so it's going to be doing a little bit of accounting some database work some document archiving maybe some planning and scheduling but light stuff for someone who wants to start maybe a little home business then we have a power user so our power users are the ones that are going to be using more processor intensive more hardware intensive equipment this sometimes is determined by the software so for example you want to do a lot of video editing then you will need the corresponding hardware to go with it all right so you are going to need the corresponding hardware and possibly software to go with that type of machine so can you see when we talk about what is it going to be used for when we ask that question it does lead to us answering that question and then buying the appropriate piece of hardware right let's go mobile users similar to our personal user you'll see this is the person that is always on the move using their smartphone and tablet that's why they call them mobile users they'll be browsing the internet playing games now when you when you take a look at these um it is similar to your personal user also you know sort of light usage but there are mobile users because now remember with your personal user that can be someone using a desktop machine doesn't have to be somebody using a laptop right can be someone using a desktop machine so your mobile users are ones who are doing those things but more on the mobile devices like your smartphones and tablets convergence always a term you need to know remember it's the trend of all these different technologies coming through into one device they are combined into a single device so please remember that be able to give a few examples of that as well on the hardware side they talk about the information processing cycle and now we go specifically into hardware we know the information processing cycle guys be able to identify the steps you don't have to put it in order but be able to explain them and be able to give an example as well okay you can see communication has been been thrown in from grade 11 um where we are dealing with our internet and our adsl and fiber connections as well that is where communication comes in all right then they mentioned to us in the bottom right hand corner i found this in one of the tests as well they were asking what does how does computers or how how do computers turn data into information now we know data's raw facts information is our closest data right turning it into something meaningful so there they just mentioned it to us that computers take that raw data and process it into information which is then meaningful right and that is how it moves from data to information all right so we've got input they they go through this again and again guys just go and read through this make sure you acquaint yourself with this we know this from grade 10 and 11 so i'm not going to go through it again but they do mention something interesting where you are combining the input sources and output destinations so here they tell us that most ict systems use multiple input sources and output destinations we look at our smartphone a smartphone or tablet may have sensors that detect movement and allow you to touch right they also have on-screen controls think about your point of sale system your point of sale system allows you to type in you know information and at the same time it is allowing you to do what to scan barcodes then you've also got musicians musicians might connect um to some sort of midi device right so they um connecting that and they're able to use that so just just bear that in mind as well then we've got our processing this is where we know the process involves things like searching sorting comparisons and what's helping you do this the ram and the cpu is working in the background to make sure that you can do that storage most of us know everything about storage we know storage is a place where we save our files and folders to it is permanent in the sense that when you switch your pc off those files are still there okay there are different types of storage media when we talk about storage media we're talking about the collective term for all the different types of storage so when i say storage media it could be a hard drive a ssd a flash drive or an external hard drive right then they talk about input devices many of these we already know but i want you to see that there is now a a distinct difference in these so let's go and have a look first one we looked at is a keyboard now we know what the keyboard does we know its advantages but guys what they throw in now is the limitations this is where things like troubleshooting is also going to come up so while we know everything about the keyboard we know how it connects to the pc same with the mouse same with a lot of these other devices just focus on the limitations and troubleshooting because that's where a lot of the questions come from so there they give us some limitations and they also talk about buying decisions like fact factors to consider when buying like we mentioned before with our computer but troubleshooting look at it sticky keys he's getting stuck um the keyboard not working maybe it's not plugged into the correct port maybe you have broken the cable maybe there's something wrong with the port if it's wireless it presents a whole lot of other problems because the batteries might be flat you might have a little dongle broken or it's in in the incorrect port or it's missing you know any of those things and the same is going to take effect when it comes to the mouse right same story if it's a wireless mouse it's going to be susceptible to the same things batteries dongle is it in the correct port all those things so just bear that in mind then our touchscreen which is a combination of input and output because i'm looking at the screen i'm getting everything out of it but at the same time i'm using the screen to input my commands and instructions so have a look at the limitations right familiarize yourself with that also the touchpad remember the touchpad replaces the mouse it places the mouse now it's not as accurate it's not as nice to work with but it's there okay our scanners by now we know what's ours what our scanners do and we know scanners take our physical media so our things like books pages you know letters anything like that and it scans it in and converts it to a digital format in our pc now in years gone by we couldn't edit that but now with the help of ocr software or optical character recognition software we can scan in a document and through that software it reads the letters on the page and gives me a document that i can actually edit so please remember you can only edit if you've got your scanner and the ocr software together that's how you can create an editable document by scanning it in now there are great advantages to your scanner and other uses please go through that there is a troubleshooting section as well now i wanted to stop you and say that most of your peripherals and we know what peripherals are yes yes we do our peripherals are anything outside of our system unit that connects to it right and most of the things that connect to output our system unit are connected by usb so when you think of your scanner just remember there's a usb cable running through to the pc there's power so it could be that the power is off the power is not plugged in properly the usb cable is broken usb cable is not plugged in properly the scanner itself is maybe switched off or it could even have and i know some of them have a lock switch that might be on right so these are all the different things to consider then we have our digital camera most of us know the digital camera works right um so i'm gonna go into the uses and advantages we look at the limitations remember the photos are easy to lose because if we lose the camera it's gone the quality of the photos depends on the quality of the camera that's very important even when we look at our phones we have some buying decisions and when we look at buying a digital camera what do we do we look at the resolution the quality many of you do that when it comes to your cell phone yes you did you did that yes first thing you looked at was the camera oh it's a 50 megapixel i want that um that's the last thing you look at anyway the resolution and then our image quality depends on three things the color depth get that in mind the sensor size and the iso writing guys one of the biggest things when it comes to cameras is the amount of light that the lens actually allows into it over there so that sensor size is big that isolate in the side means that you can have a lot more light coming through which means the image is going to be clearer even when you are in low light conditions like i mean i've got my canon camera over here switch off my light there's my low light conditions party in the dark and then i switch on my light yay i'm back okay that's the kind of difference that your sensor size can make so if you've got a very you know very very cool camera that's got um lovely big sensor size good iso rating and even when you are let me actually turn this down even when you start turning the light down you can still end up getting a good quality picture out of it why because it's able to take in as much light as possible and i mean even on this canon camera i know there are certain lenses that in exactly the same position where i am now will let in two or three times the amount of light but it does come at a bit of a cost so we'll see all right then they just mentioned about life before digital and read through that don't really need to know much about that because they don't really ask you on that our webcams we know our webcams and generally our webcams just have one cable usb cable that runs to the pc that's it we know what it's used for we know the advantages look at the limitations some of them have low resolution but not all of them right some of the newer ones have you know they're unlike 1080p beautiful quality so yeah the very low resolution doesn't really make sense anymore but it must be connected to some sort of device now when you have issues with it think about it this way there's only one cable well it can be the cable it can be that it's not plugged into the correct port maybe the software is not using the correct camera sometimes you need to just restart the pc and sometimes you need to just unplug it and plug it back in or if there's software that's using it maybe just restarting that software program as well microphone like i'm using over here we know what that's used for it's there to capture audio and that's beautiful we know what it's useful we know the advantages the limitations include the bulky microphones don't generally provide high quality sound again guys i'm not going to agree with that 100 um because a lot of the new phones i mean this is a samsung note 20 and the um mic on there's perfectly fine i mean i use it for some of the recordings and it's it's been working very very nicely um difficulty using noisy environments i will agree with that okay right then they mentioned to us at the bottom the only troubleshooting comes when it's plugged into the wrong jack or set on mute okay now i'm gonna dispute that a little bit yes it can be plugged into the wrong jack yes it can be set on mute but this microphone for example is a usb powered microphone so i could be plugging it into the wrong port i could have it not plugged in correctly over here i could have the volume turned down i could have the software not using the correct mic do you see where i'm going with this right so think about it practically think about it logically if i've got a setup like this what could go wrong and how would i be able to best solve that then i've got my output devices and output they tell us how an ict device shows the results of processing okay i'm gonna go into the monitor we know our monitor we know that our monitor's size is measured diagonally in inches we know that the quality that we look at is in terms of resolution because it's made up by our pixels that is important also the aspect ratio whether it's 16 by nine or that letterbox four by three that aspect ratio that image quality there they tell us also depends on the color depth the pixel density that's an added thing now pixel density the refresh rate and the contrast ratio know those things folks in case they ask you that um i would say that that is important to know and then they give us some troubleshooting um they give us the problems and the solutions so acquaint yourself with that right acquaint yourself with that make sure that you know those things speakers and headphones we know this we know the limitations we know some of the problems that can arise whether it is physically plugged in whether it is via bluetooth you know maybe there's something interrupting the the connection you know anything like that but that i think we are familiar with right then our printers so our printers we have laser inkjet and dot matrix and don't worry about dot matrix because they really only ask in fact last year i did a video saying that the department of education said no more dot matrix so just laser and inkjet the laser works with a laser inside and a substance called toner net toner is like a powdery substance what does it do between the two it burns the image onto the page that's why your pages come out warm when you print a laser printer the inkjet printer it's physically sprays ink onto the page that's why your pages come out with right so inkjets are for like you know color printing high quality color printing your laser is just to get bulk copies so just bulk black and white printing you do get color lasers but they are very expensive oh printers plug in via a usb cable and power so again problems that can arise the printer is not switched on the printer is not plugged in the usb cable is not plugged in there might be an issue with the printer and the software drivers remember what a driver is not that that guy that takes you from a to b no not the uber driver no not that one it's a piece of software that tells windows how to work with that piece of hardware if that driver is not doing its job it can create problems maybe you're not even choosing the correct driver right i saw one question that said how does the settings on a printer influence green computing so remember with green computing we said we recycle the cartridges ah the hardware we refill the ink cartridges we print on both sides of the page we print using the least amount of ink so those things when it comes to settings you're printing double-sided and the amount of ink you're going to use those are things that will play a role in green computing bear that in mind right so some factors to consider when we buy we want to look at how fast the printer is in terms of pages per minute whether it's color black and white the resolution the cost per page sometimes you're working with some of those big printers when you look at the cost per page the paper that it can handle whether it's compatible with your operating system and whether you want you know a a mobile printer whether you want a wireless one cabled one you know it all depends on what are you going to be doing with that device same question we asked me when we bought the pc okay same question then we've got 3d printing now we know that this is a printer that creates physical 3d form so it will print out a physical three-dimensional object for me now as lovely as that is just understand they are expensive it takes long to print so those are just some of the limitations and when it comes to troubleshooting it's not as simple as the things we've mentioned now um it's pretty tricky and it's hard to solve some of the problems that are there and there's many factors involved in that so just bear that in mind all right then we've got our data projector again we know what it's useful we know the advantage some of us have it in our classes the limitations are things like the resolution if there's too much light in the room it can interfere with the image that's thrown up against the wall right images are not as bright as those of high quality display monitors this is why in some uh i think let me use the example of churches there are a lot of churches that have moved away from projectors to actually using tv screens because they get a better quality picture out of that plus it lasts longer because with the data projector uh it has a bulb that has a life span right so you need to just bear that in mind storage devices guys these we know we know what our hard drive is by now we've done great 10 11 cat know the limitations um we know that we can have things you know problems like the hard drive being full we need to clear that right um the system can seem very slow we need to use disk defragmentation and you can have corrupt files okay so those are just some of the things that we can pick up our external hard drive we know what an external hard drive does we know that it's not as small as a flash drive but it gives us portability right and it i wouldn't say drains the battery power on the laptop but okay let's go with that for now you know flash drive very simple to use all of us know then just be in mind it's more expensive per gig than hard drives please remember that right it's also easy to lose then they mention social and ethical considerations please go and watch my other video where i deal with the test paper for term one and you'll see why this is there all right then we've got a solid state drive please this is very important they only ask you really on the solid state drive and with the solid state in comparison to your normal hard drive so this one is completely electronic it's an electronic alternative to your hard drive it's faster it is more expensive there are no moving parts it is much more energy efficient but again i'm emphasizing that it is more expensive than your traditional hydro then we've got optical media and this is generally only brought in because of the size differences so our optical media this is something that that needs a specific drive to read it right so our cities and dvds needs a cd or dvd drive in order to read the information from their disk they are slow they are easily damaged they have low cap low storage capacity so this is why it has really basically been um phased out and we really only use it when we like in a real jam because if you look at it most laptops and desktops don't even have these drives anymore some of the troubleshooting you can just read through that a lot of this is not even really relevant anymore then decisions about storage there are some pertinent questions to ask what size hard drive do you need again i'm going to go back to that same thing what are you going to be doing with this device so how much storage do you need do you need an optical drive most of us know do you need to write to disks yes if you do then you need an optical drive right so all of these are just questions that need to be asked in order for you to make the right decision guys don't just go out and buy something even when it's on a black friday sale think before you spend all right when we look at communication devices like our cellular modems um some of you might have seen these things others not uh they're just about that size you've got your little dongle and you used to get the old ones that plugged into a usb port and had a sim card in them so to plug into usb port on your pc you'd have software open it up these days you don't even need that these devices are standalone um they create little wi-fi you know zones you can then connect to that and then connect to the internet we also have things that some of us have at home which is our adsl and fiber routers please this is a router that you are seeing in the picture over there right you will have a physical cable running from that connecting you to whoever your isp or your internet service provider is those antenna are there to provide a wi-fi zone using that signal that is coming in okay so you'll see on some routers and i'll show you mine maybe in a different video it's got three massive antenna why because it gives me a much larger um wi-fi range within my house okay so we've got ads ln fiber please remember adsl is slower than fiber fiber uses fiber optic cables and it transmits the data via light our adsl is still using normal network cables around about cat6 and the data is transmitted via cables okay electrical um signals going through cables right then we move on to 1.3 hardware recommendations we've spoken a lot about this already considerations when buying a computer so you can go and read through that we have spoken i think in detail about this already we look at things like our system unit our cpu we know what that is there for guys do you see what's happening now they're starting to combine these things they're taking our hardware factors they're giving us some more details on it and they throw in a user who would be looking at things like this right there they mentioned the personal user soho the power user right here is a typical example of our ram our memory now when i look at this i can see this is a corsair that's the manufacturer corsair memory and the model is a ddr so that refers to the speed of this ram i can see there's one two three four slots this is a motherboard that can handle up to six gigabits per second in terms of processing capacity that can run through that so very nice that corsair memory is very expensive by the way okay so our memory our ram they tell us what the ram is we know that right these are things that come up as questions okay so please know this okay it can be there if it's there for any user because every user uses ram right um the power users will require more okay think about the gaming guys think about the video editing people um they are going to be using a lot more than then the inside our system unit we've got in our hard drive and you can see inside our hard drive we've got our disks that are spinning similar to our old lp players our hard disk drive permanent storage area this is what it does it gives us some more info on that guys and just tells us yes every user is going to be using this unless you go in for a solid state drive so again it all depends on what you are going to be doing with it then we've got our graphics card this is a dedicated graphics card it's a physical card extra to what you have built in on your motherboard so you can see on it there we've got an output to vga dvi and then hdmi so this card can output to three separate devices if i've got um three monitors this one card actually pushes that signal out you can see it's got its own fan as well a lot of these cards have their own memory as well right some of them have their own graphics processor built onto it because of what it needs to do right now video cards separate circuit board that plugs into the motherboard entry-level computers have them built in when you're dealing with power users you need that extra bit right especially for 3d graphics then we've got our dvd drives these are examples over here these are examples of optical drives they read the cds there's a little laser in them that reads the content on the cd cdn dvd is an example of optical media but these are the physical drives that we need for them so again you can just go and read through that a major uh over there then our ports we just need to know some of our ports that we find on the back of the pc as well so please go and check out some pictures familiarize yourself with some of these um there we've got i'll go this way we've got a usb port we've got our network card there's our sound card over there as well we've got thunderbolt ports we've got a vga port um these are specific video ports over there to transfer video files so please just know what these things are there for okay be able to identify those ports in our system unit is our case our tower but we call it a system unit we don't really have much of a choice in you know that when we go and buy unless we're building something custom made right as is the case there all right the design of the case just remember that affects airflow and the cooling of the computer this is why when you look at gaming computers you see they've got a whole lot of fans in them some are even water cooled because of the processing that's happening there on a constant and consistent basis then we have devices that connect to our computer let me just move myself there okay we've got our mouse and keyboard now i'm sure i don't have to tell you anything about that right except just to mention the ergonomically designed keyboards and mice that are available um we've got our monitors again guys you can go and read through this these are things that we have covered our printers and who's going to be using them very importantly know what type of user will use which printer a laser printer will be for someone who's going to print a lot of copies in black and white as soon as they go over to color they need to go inkjet right but if they're doing bulk color copies then we need to go color laser right devices that connect again our external things like our flash drives our external hard drives we've got scanners as well guys again we have touched on these things and then this is very important because this is one thing that trips up a lot of you consistently consistently there's a difference between being visually impaired and blind i am visually impaired you see these glasses i am visually impaired if i wasn't i would you know chat to you like this and i'd have beautiful vision but i don't okay um but i'm not blind so visually impaired what can you do on the pc to help me work with a pc in a way that caters to my needs i can have a large keyboard i can have a bigger display you can use a magnifier to increase the size of the icons and you know everything else on the screen i don't use braille i'm not blind right if i'm blind i'm going to use a braille keyboard i'm going to use a braille printer that's fine hearing impaired is different to being deaf most of you you don't listen in class so you are urine impaired okay you are not deaf you are just hearing impaired don't worry it's fine you'll get over it okay um so for someone who's yet an impaired we'll turn up the volume someone who's deaf we're gonna use vibration devices we're gonna use more um you know visual signals why because the person is not blind guys don't confuse this if someone is deaf they are not blind read your question okay and then we have folks who have motor control issues someone might be paralyzed someone might have poor motor control that means that they can't even grip things properly because they don't have um fine motor skills they don't have the um the ability to actually send that signal from the brain properly and have it grip that device so you could have eye movement devices head movement devices large keyboards trackballs any of these things but please differentiate between these different things right and then i think the last oh still here the value of ict again they touch on what we some of the things that we did chat about earlier on so that's fine um yeah we know all this now gone through all of these things accessibility is what we were talking about earlier as well ict makes knowledge and resources accessible to anyone and everyone regardless of who they are or where they are from as well okay so accessibility big thing when it comes to ict then they chat a little bit about some new technology we know that a lot of the new tech will be smaller cheaper faster not always cheaper sometimes more expensive but it's got more senses it's able to do more it should have a longer battery life doesn't it sound like a cell phone advert sounds like a cell phone but but anyway that that's what it is and then they combine everything to give you um a device that it's easier to use that's more effective and can just do so much more for you right the model 1.4 last one we talk about software we know software are programs that perform specific instructions right now we've got our hardware in place we've bought our pc but we want to choose the right software how do we do that we're going to look at the purpose of the software here they tell us many applications that can perform the tasks you wanted to perform so what do you want the software to do right notepad for example can be used to write anything but word gives you more features okay so that's a reason why you'd be using notepad or reason why you'd be sitting using word you might want to use photoshop because you have a need to do those things right we have this is very important your web-based applications versus your installed application so when you have an installed application it's one that's physically installed onto your hard drive it's taking up space on the hard drive it doesn't use the internet or anything like that it's installed on your pc and there you go you can run it anytime you want to anywhere with a web-based application means that the program sits on the internet so in order to open it in order to use it in order to make use of it like google sheets you will need to unfortunately have a connection to the internet it's beautiful that it doesn't take up space in your hard drive you can access it from anywhere you want to as long as you have an internet connection but that in itself can pose a problem so just bear that in mind and then they give us a few examples like the ones that i just mentioned now about google sheets google calendar all these things it is beautiful to have these things but just understand the limitations around it and you've got subscription-based softwares now this is software in fact let me let me put it to you this way and this is a question that came up in the test right the test that i did in the other video go check it out guys please um you'll see what i'm talking about traditional licensing models and your subscription software so your subscription software says well this is software you can use but you are basically renting right so like you have a subscription to netflix you subscribe to netflix you pay you get the service you pay maybe once a year or maybe once a month to utilize this particular software so office 365 is an example of that whereas your traditional licensing says you buy it once off so you pay once and never again and you use it for the rest of your life that's the difference between those two pieces of software and you need to know that when it comes to software we also need to look at compatibility will it be compatible with the operating system we are using will it be compatible with the phone that we are using some apps some programs are not compatible with the hardware that we have then i also mentioned system requirements now this is something we touched on in grade 11 as well so again you can go have a look through this but this you must know because this is very important this can constitute something like 20 or 30 um marks of your paper because they can ask you a lot of questions just based on system requirements you can give a scenario based on those pc specs when we talk about the system requirements what we're essentially saying is what does the software need from the hardware in order to run at its best are they telling you the type of process it needs the amount of memory it needs the hard drive space it needs the graphics card it needs even the operating system and an internet connection if you have all these things and better it will run at its absolute best if you don't well you can expect a couple of problems here and there along the way all right then we have our application software all right our application these are our apps again performing specific instructions we have office suites that include things like word processing spreadsheets presentations and database we know that we're currently working in one okay so we know that you've also got productivity software for the mobile user where there are lightweight versions of the productivity software so sometimes you'll get a version of let's say adobe acrobat or photoshop for your phone but it's a lightweight version of the actual product that you'd use on your pc but things like automatic scheduling sorry automatic meetings scheduling video conferencing note taking you know all these different things again to improve and assist with productivity please read the question please okay reference software this is helping you to find information right we've got web browsers please know the difference between a web browser a search engine and a website the web browser is a piece of software it allows you to navigate on the internet your website is a collection of related web pages put together based on the internet right your search engine gain there is software inside a website that allows you to search for particular things please don't say a search engine is google chrome or web browser is google please don't confuse those things we've got email software as well like gmail and microsoft outlook and yahoo mail this document management software so guys you can just go through the different types of software we also have voice recognition software again this falls under accessibility so the person might have some sort of disability and we want to give them because they maybe have no motor skills and they can use voice recognition software to give verbal instructions to the pc as to what to do let's understand it has its limitations so yeah go through that if i can just give an example when i see this now siri how many of you actually use siri and why don't you use siri more simply because you've got to change the way you speak in order for study to register and understand what you were saying so it needs time to actually pick up and and learn your voice all right so there's no taking software um you have different things you've got education or training software as well please go check out the test again there was a question based on these things to understand what is the difference between note-taking software programs that deal with taking notes helping you do that educational software or training software programs that are going to help you with education and training what does that mean if i'm studying online that's education so when i study online i can work at my own pace i can access it any way i want to i can work in different groups online as well so there are a lot of advantages to that right again all these others you can just go through and then they mention fixing software problems this is important things that did come up freezing programs how do you sort them out you can use ctrl alt delete to get your task manager and shut the program down right so that is usually the main way without shutting down the pc listen to the scenario listen to the question they want you to solve a program that's or sort out a program that's sort of frozen but you don't shut down the entire pc on throw all delete to get your task manager is the way if the software crashes you can reboot the whole system you can reboot the program maybe uninstall the program and reinstall it again right there are different ways to handle that and then when it comes to read-only files please just remember that this is an attribute that's been added to the file you can remove that attribute you can save it as a different name and that read-only attribute falls away right so please just again read through those then also know the difference between a bug and a virus i think they do talk about a no a bargain a virus a bug is a problem with the software it's picked up some other little problem they call it a bug they are not viruses they are mistakes a virus is malicious software it's done on purpose it's there to harm you okay so please this is why a lot of people want a lot of companies force people to update their software so that they can eliminate these bugs when they do find it then also they chat a bit about the user centered design this relates more to html looking at things like the layout and readability the font and color all all these types of things um and they just mentioned here some of the steps to include in the process of user centered design put the user's need first this is what apple did and this is why they success so successful they put the user's need first what is best for the user in their hand what is best in terms of the user operating the phone this is why apple has a totally different feel to any other phone okay not advocating apple used to be an apple boy okay now i've moved on they just become bit too expensive for me test them on real users to find out is it working repeat this process and refine it this is why you have phone sometimes coming out in like a beta version or software coming out in a beta version companies want you to test it tell them what's wrong and so they can work out all these bugs before releasing it to the general public right guys and i think that is it from me so it looks like that sorts everything out for uh our modules 1.1 to 1.4 thank you so much for joining me please go over now i hope i'm going to put it up here or the link will be somewhere please go and check out that test you'll see how it relates to everything we've just