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What is a Barcode Reader Device ? Data can be coded in the form of small lines which are known as Bar Codes. Bar codes represent the alphanumeric data by combination of vertical lines which contains different width & spacing between them. Bar Code Reader is a device which are used to recognized bar code…
What is MICR (Magnetic Ink Character Recognition) ? MICR systems use special ink which can be magnetized, to print characters that canthen be read and decoded by special magnetic devices. The common E13B font is used to write these special kinds of cheques. E13B font contains 0-9 numbers & 4 symbols. Detection of characters is…
What Is Optical Character Recognition (OCR) ? OCR capable of recognizing alphabets & numbers printed on paper. It can also capable of recognise shape & identify character directly from source document. It is always used with character recognized software. It converts bitmap images of character to equivalent ASCII code. First it create bitmap image of…
What is a OMR (Optical mark reader) OMR is a device that is capable of recognised pre-specified type of mark made by pencil or pen. The Optical Mark Reader is a device which can detect the presence or absence of a mark on a paper. The OMR recognise the marks by focusing a light on…
What is a Scanner and Its Types Scanners are input devices. They are capable of entering information directly into the computer. The main advantage of direct entry of information is that users do not have to key the information. And another advantage is that through Scanners you can input Graphical Data into the computer. This…
What is a Webcam ? WEB CAMERA – It’s an input device. Used to feeds the image to a computer or computer network often via USB or Wi-Fi. Web camera is a hardware camera connected to a computer that allows everyone to connect to internet to view either pictures or motion video. Most Web cameras…
What is a Microphone ? It’s an input device. Used to stores the voice data into the computer system. Microphones are a type of transducer – a device which converts energy from oneform to another. Microphones convert sound waves into electrical energy. Different types of microphone have different ways of converting energy. All the microphones…
What is a Digitizer ? An input device. Used for converting pictures, map & drawing into digital form. Allows one to hand-draw images and graphics, similar to the way one draws images with a pencil and paper. Also be used to capture data or handwritten signatures. The device consists of a flat surface upon which…
What is a Touch Screen in Computer ? Touch screen is a pointing device. It is most simple & easiest to learn of all input devices. It allows the user to choose from available options by simply touching with their figure to the desired icon or menu item displayed on the computer screen. A touch…
What is a Light Pen ? Light pen is a pointing device which is used to draw directly draw on the screen. It is called light pen because it is similar to a pen & senses light. It’s an input device in the form of light-sensitive stick used in conjunction with a CRT display. The…