Created by me

2. Computer is an electronic device that stores ,
retrieves and processes data, and can be
programmed with instructions. A computer is
composed of hardware and software, and can
exist in a variety of sizes and configurations.

3. C Common
O Oriented
M Machine
P Particularly
U Used For
T Technical
E Education
and
R Research
The computer system essentially comprises
three important parts – input device, central
processing unit (CPU) and the output device.
The CPU itself is made of three components
namely, the arithmetic logic unit (ALU),
memory unit, and the control unit.
In addition to these, auxiliary
storage/secondary storage devices are used to
store data and instruction on a long- term
basis.

5. N P

6. In computing, a keyboard is a typewriter-style device,
which uses an arrangement of buttons or keys, to act
as mechanical levers or electronic switches.
A keyboard typically has characters
engraved or printed on the keys and
each press of a key typically
corresponds to a single written
symbol.
Following the decline of punch cards and paper tape, interaction
via tele printer-style keyboards became the main input device
for computers

8. Other Input
Devices

9. An output device is any piece of computer hardware equipment used to
communicate the results of data processing carried out by an information
processing system (such as a computer) which converts the electronically
generated information into human-readable form

10. CRT
LCD
LED
A monitor or a display is an electronic visual
display for computers. The monitor comprises
the display device, circuitry and an enclosure.
The display device in modern monitors is
typically a thin film transistor liquid crystal
display (TFT-LCD) thin panel, while older
monitors used a cathode ray tube (CRT) about as
deep as the screen size.

11. SPEAKER :
It is another output device. It’s main output is audio. It helps the user to
get or listen the audio files from computer.

13. Impact
Non-
Impact

14. Dot matrix printing or impact matrix printing is a
type of computer printing which uses a print head
that moves back and forth, or in an up and down
motion, on the page and prints by impact, striking
an ink-soaked cloth ribbon against the paper, much
like the print mechanism on a typewriter

16. The laser printer was
first invented by a team
at Xerox in 1969.
A laser printer is a printer for computers. It
uses LED-technology to get
small particles of toner from
a cartridge onto paper. Very often, this is
more economical to use than the ink of inkjet
printers.

17. Inkjet printing is a type of computer printing that recreates a digital image by
propelling droplets of ink onto paper, plastic, or other substrates.
Inkjet printers are the most commonly used type of printer ,
and range from small inexpensive consumer models to very
large professional machines that can cost tens of thousands
of dollars, or more.

20. Referred to as the brain of the
computer, processor, central
processor, or microprocessor, the CPU
short for Central Processing Unit, was
first developed at Intel with the help
of Ted Hoff in the early 1970's. The
computer CPU is responsible for
handling all instructions it receives
from hardware and software running
on the computer.

21. Components of CPU
 ALU
 CU
 MU

22. CPU
Introducing
ALU , CU and MU

23. An arithmetic logic unit (ALU) is a
digital electronic circuit that performs
arithmetic and bitwise logical
operations on integer binary numbers.
It is a fundamental building block of the
central processing unit (CPU) found in
many computers. Powerful and
complex ALUs are often used in
modern, high performance CPUs. A
single CPU may contain multiple ALUs.

24. The control unit (CU) is a component of a computer's
central processing unit (CPU) that directs operation of
the processor. It tells the computer's memory,
arithmetic/logic unit and input and output devices
how to respond to a program's instructions.

25. The Memory Unit is the part of the
computer that holds data and
instructions for processing.
Memory associated with the CPU is also called primary storage, primary
memory, main storage, internal storage and main memory.
When we load software from a floppy disk, hard disk or CD-ROM,
it is stored in the Main Memory.
There are two types of computer memory inside the computer, RAM
and ROM.
Although it is closely associated with the
CPU, in actual fact it is separate from it.

26. Memory Unit
RAM ROM
Primly stores data
Volatile
Read Write Memory
Don’t store but have pre
permanent stored data
Non-Volatile
Can’t be altered

27. USB (to attach device,
pen drive etc.)
RJ 45 (for networking)
RJ 11(to connect
telephone line.)Parallel port (to connect
printer and scanner)Serial port (to connect
Keyboard and Mouse)

28. Address
Bus
Specify the address
of a memory
location
Width determines
the no. of memory
location
Data Bus
Transfer the data
Transfer from one
place to another
Control
Bus
Carry signal about
current status
i.e. indicates
whether CPU is
reading or writing
from main memory

29. A data storage device is a device for recording
(storing) information (data).
USB
CD and DVD
Hard disk
Floppy
Magnetic Tape

30. DVD Magnetic Tape Micro Chip Macro Chip
CHIPS
• DVD ( "digital versatile disc" or "digital video disc") is a digital optical disc
storage format, invented and developed by Philips, Sony, Toshiba, and
Panasonic in 1995. DVDs can be played in multiple types of players, including
DVD players.
• Magnetic tape is a medium for magnetic recording, made of a thin
magnetisable coating on a long, narrow strip of plastic film. It was developed
in Germany, based on magnetic wire recording. Devices that record and play
back audio and video using magnetic tape are tape recorders and video tape
recorders.
• An integrated circuit or monolithic integrated circuit (also referred to as
an IC, a chip) is a set of electronic circuits on one small plate ("chip")
of semiconductor material, normally silicon. This can be made much smaller
than a discrete circuit made from independent electronic components.

31. Pen Drive(USB) Floppy Hard Disk CD
A USB flash drive, also known under a variety of other names, is a data storage
device that includes flash memory with an integrated Universal Serial Bus (USB)
interface.
A hard disk drive (HDD), hard disk, hard drive or fixed disk is a data storage
device used for storing and retrieving digital information using one or more rigid
("hard") rapidly rotating disks (platters) coated with magnetic material.
A floppy disk, also called a diskette, is a diskstorage medium composed of
a disk of thin and flexible magnetic storage medium, sealed in a rectangular
plastic carrier lined with fabric that removes dust particles. Floppy disks are
read and written by a floppy disk drive (FDD).
Compact disc (CD) is a digital optical disc data storage format. The format was
originally developed to store and play only sound recordings but was later
adapted for storage of data (CD-ROM).