referral devices devices that are connected to the computer that output information provided by the cpu output peripherals the output can be presented through many ways including electronic display monitors printed printers or plotters video audio speaker and tactile forms let's now dive into the different forms of output peripherals monitors a monitor provides the output as a form of electronic display it is the most common form of output some of the monitor's features include screen size which is measured diagonally resolution which is measured in pixels and the energy efficiency with other methods to save energy like screen savers or low power standby printers there are three main types of printers dot matrix dot matrix printers are also called impact printers because they print by hitting the paper through a ribbon of ink he writes features which you can use to compare it with the other printers slowest cheap low cost per copy rare color printing and low quality dot matrix printers use carbon copy layers so many copies can be printed at the same time inkjet printers inkjet printers use cartridges full of ink to print this put this ink on the paper to form whatever must be printed there will be a black cartridge along with the cyan magenta and yellow cartridge fast medium cost high cost per copy color printing available and high quality inkjet printers are used in homes in fact i'm sure the printer in your house is an inkjet printer laser printers laser printers have a rotating cylinder with an electric charge then a laser discharges the points needed so that the toner is attracted to those points and an image is heated onto a paper it's mainly physics some of the features include fastest expensive medium cost per copy color printing available and highest quality laser printers are often used in large businesses if a lot of printing needs to be done 3d printer a three-dimensional printer is used to create a model for any digital design it works by adding layers of heat and material from bottom to top making it take a lot of time to create a model plotter a plotter draws a high quality drawing of a digital design these designs are often made through a computer-aided design software and its working process is pretty simple a pen is moved on a paper to make the design it is often used by designers architects and engineers data projectors you might have seen a data projector in home entertainment system or at school when presenting something a data projector has light bulbs which have various brightness levels and are important part of the projector so they are very expensive to replace resolution has different qualities of screens like monitors zoom functionality to allow the projected screen to be enlarged or made smaller and portability not all projectors are portable but the newer ones are smaller and lighter so they are easy to carry around speakers a speaker as you probably already know is used to output sound you often get them in pairs want to output the right sound and the other for the left this is called stereo or surround sound and is often found in home entertainment systems control devices also known as actuators are devices that actually make something happen in the real world these devices are often thought of as mechanical some examples are valves pistons heaters coolers and motors so you