To function properly, the computer needs both hardware and software. Hardware
consists of the mechanical and electronic devices, which we can see and touch.
The software consists of programs, the operating system and the data that reside
in the memory and storage devices.
A computer does mainly the following four functions:
l Receive input —Accept data/information from outside through various
input devices like the keyboard, mouse, scanner, etc.
l Process information—Perform arithmetic or logical operations on data/
information.
l Produce output—Communicate information to the outside world through
output devices like monitor, printer, etc.
l Store information—Store the information in storage devices like hard
disk, floppy disks, CD, etc.
These four basic functions are responsible for everything that computers do.
The hardware components of the computer specialize in any one of these
functions.
Computer hardware falls into two categories: processing hardware and the
peripheral devices. The Processing hardware consists of the Central Processing
Unit (CPU), and as its name implies, is where the data processing is done.
Peripheral devices allow people to interact with the CPU. Together, they make
it possible to use the computer for a variety of tasks. Various parts of the
computer have been shown in Fig. 1.1
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consists of the mechanical and electronic devices, which we can see and touch.
The software consists of programs, the operating system and the data that reside
in the memory and storage devices.
A computer does mainly the following four functions:
l Receive input —Accept data/information from outside through various
input devices like the keyboard, mouse, scanner, etc.
l Process information—Perform arithmetic or logical operations on data/
information.
l Produce output—Communicate information to the outside world through
output devices like monitor, printer, etc.
l Store information—Store the information in storage devices like hard
disk, floppy disks, CD, etc.
These four basic functions are responsible for everything that computers do.
The hardware components of the computer specialize in any one of these
functions.
Computer hardware falls into two categories: processing hardware and the
peripheral devices. The Processing hardware consists of the Central Processing
Unit (CPU), and as its name implies, is where the data processing is done.
Peripheral devices allow people to interact with the CPU. Together, they make
it possible to use the computer for a variety of tasks. Various parts of the
computer have been shown in Fig. 1.1
Global Teachers Academy formally name as UGC
NET D is an India’s Premier Institute in Delhi for UGC (JRF-NET-SLET) &
Other University Entrance Examination. Established in 1978, was conceived with
vision for quality education by eminent who are for long committed to
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