🔹  Optical mark recognition (OMR) is an electronic method of gathering human-handled data by identifying certain markings on a document. Usually the optical mark recognition process is achieved with the aid of a scanner that checks the transmission or reflection of light through the paper; places having markings will reflect less light than the blank paper, resulting in less contrasting reflectivity.

  🔹  A character reader, also known as an optical character reader (OCR/MICR), is a device or software that can recognize printed or written characters, such as letters, numbers, and symbols.

   🔹 A mouse is a small device that a computer user pushes across a desk surface in order to point to a place on a display screen and to select one or more actions to take from that position.

   🔹A joystick is a hand-held input device used to control the movement or actions of a digital object on a computer screen. It typically consists of a handle or a lever that can be tilted or pushed in different directions to provide input to a computer or a gaming console.

  🔹 A barcode reader or barcode scanner is an optical scanner that can read printed barcodes and send the data they contain to computer. Like a flatbed scanner, it consists of a light source, a lens, and a light sensor for translating optical impulses into electrical signals.

  🔹 A document scanner is a device that converts physical documents into digital files. Desktop scanners can scan up to 100 pages per minute and have automatic document feeders. Portable scanners smaller and cheaper than desktop scanners, making them a good choice for small businesses 

  🔹  A light pen is a device that uses light-sensitive sensors to put information on the screen with the help of a cathode ray tube. A light pen is used to draw text and diagrams or select the object with the user interface system in the CRT monitor.

   🔹 A touch screen terminal allows the user to directly interact with the device without secondary equipment like a mouse or keyboard. It does not need a stylus. Touch screen terminals can be found attached to computers, as separate machines or connected to a network.

     🔹 Voice Response Unit (VRU) is a component of an Interactive Voice Response (IVR) system that interacts with callers using pre-recorded or synthesized voice prompts. It allows callers to navigate through menus, provide input, and receive automated responses or perform self-service tasks.

     🔹Touchscreens are display screens that can detect touch input from a user, allowing them to interact with a device by touching the screen. Touchscreens are both input and output devices, allowing users to view options on the screen and then select them with their finger

    🔹 A computer keyboard is an input device used to enter characters and functions into the computer system by pressing buttons, or keys. It is the primary device used to enter text. A keyboard typically contains keys for individual letters, numbers and special characters, as well as keys for specific functions.

    🔹A digital camera is a camera that produces digital images that can be stored on a computer, displayed on a screen, and printed.

    🔹Biometric systems are using personal characteristics (directly linked to who you are) to authenticate or identify a person. A system collects biometric characteristics unique to every person. These biometric characteristics are then directly linked to verify or identify the individual.

    🔹 The webcam is a hardware camera and input device that connects to a computer and the Internet and captures either still pictures or motion video of a user or other object.