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Microphone: A microphone converts sound into digital audio, enabling it to
be stored or processed on a computer. It captures audio input and is essential
for tasks like recording, voice calls, and speech recognition.
Barcode Reader: A barcode is a series of parallel lines used for
product identification. Most packages feature these barcodes,
which can be easily read by barcode scanners. These scanners
shine a light on the barcode and detect the reflected light. The
scanned barcode is then stored on a computer for invoicing
purposes.
Magnetic Ink Character Recognition: Bank account numbers and other
details on cheques are printed with a special magnetic ink, which can be
read by Magnetic Ink Character Recognition (MICR). This technology
helps verify whether a cheque is genuine or counterfeit.
Digital Camera: A digital camera can serve as an input device by
capturing visual information in the form of images and videos. It can
be easily transferred to a computer for further processing, analysis, or
storage.
Graphics Tablet: A graphics tablet, is a type of input device that consists of
a flat, rectangular surface with a stylus (digital pen) used for drawing, writing,
and interacting with graphical applications. It also takes handwritten work as
an input and converts it into digital form.
Smart Card Reader: Smart card readers are devices used to read and
write data on smart cards. They have a slot where the card is inserted
and can update information or store secure data. They are commonly
used for security, logging into networks, and making safe transactions.
Magnetic Stripe Reader: A magnetic stripe reader is an input device
used to read data from the stripes on credit, debit, ID, and access cards.
The information is written once and can be read multiple times.
Joystick: A joystick is an input device mainly for video games and simulations.
It has a stick for controlling characters or vehicles on the screen, with extra
buttons for commands. Joysticks offer precise control and are popular in flight
simulators and racing games.
Processing Device- Central Processing Unit (CPU)
After receiving information from input devices, the computer processes it using the Central
Processing Unit (CPU), often called the brain of the computer. The CPU has three main parts:
ALU (Arithmetic Logic Unit): Handles basic math like addition and subtraction, and compares
things like greater than or less than.
Fundamentals of Computer 15

