[Music] hello everyone welcome back to our channel cas pictorial this tutorial is about one of the major components of a computer the input devices we will get to know how each input device looks like and its purpose these are the components that make up a computer the input devices send data to the central processing unit for being processed the processed information is then sent to the output devices the most commonly found input device is the keyboard everyone would have already seen and used a keyboard it is the device used to enter text this is another most familiar input device the mouse it is a pointing device that controls the cursor this is the joystick you would have found this control device in kids play zones for controlling video games the light pen is a light sensitive pointing device it was used with the old crt monitors to highlight the text on the screen the trackball is similar to a mouse instead of moving the whole device you simply roll the movable ball on top of the trackball trackball is rarely used in place of a mouse this is again a familiar input device the scanner it scans or captures images for computer editing the passport scanner is another input device these scanners are designed for quick scanning of passports id cards resident permits and driving licenses you can find these scanners in airports security posts international hotel check-ins etc pen scanners are designed to enter printed text from magazines newspapers letters etc into the computer screen slide the pen over any text and in less than a second it appears on your screen the pen scanners are particularly useful for reading large numbers on forms entering small text portions in word processors where manual entering would make mistakes this is the device which has become an essential requirement of every shopping malls the barcode reader it can read printed barcodes decode the data contained in the barcode and send the data to a computer the omr reader omr stands for optical mark recognition for instance the omr sheets could be used for answering multiple choice questions in exams the omr scanner then reads pencil or pen marks in ymr sheets the evaluation of answers is made instantaneous with an omr reader a graphics tablet allows a user to hand draw images with a special pen-like stylus the image is then displayed on the computer monitor webcams have become very popular it is found in almost every home these days the webcams can be used for recording videos and also during a live video on the internet okay then it's done for today hope you would have found this video informative please leave your comments please do not forget to subscribe to our channel for more such informative videos hit the bell icon for sure thank you for watching you