What is Computer

1.  1. Mainframe Computer – It is high capacity and costly computer
 2. Super Computer – This Category of computer is the fastest and
also very expensive.
 3. Workstation Computer – The computer of this category is a high-
end and expensive one
 4. Personal Computer (PC)
 5. Apple Macintosh (Mac)
 6. Laptop Computer (Notebook)
 7. Tablet & Smartphone.

2. Mainframe Computer Definition?
• Definition & Meaning – Mainframe computer
likes as a big centralized machine that contains
the large memory, huge storage space,
multiple high grade processors, so it has ultra
processing power compare to
standard computer systems. So, mainframe
computer system’s importance is increasing
for large scale organization, scientific research,
consumer statistics, and census data.

4. • Supercomputer, any of a class of extremely
powerful computers. The term is commonly
applied to the fastest high-performance
systems available at any given time.
Such computers have been used primarily for
scientific and engineering work requiring
exceedingly high-speed computations.

6. • A workstation is a special computer designed
for technical or scientific applications.
Intended primarily to be used by one person
at a time, they are commonly connected to a
local area network and run multi-user
operating systems.

8. • A personal computer is a multi-purpose
computer whose size, capabilities, and
price make it feasible for individual use.
Personal computers are intended to be
operated directly by an end user, rather
than by a computer expert or technician.

10. APPLE MACINTOSH (MAC)
• The Macintosh is a family of personal
computers designed, manufactured, and sold
by Apple Inc. since January 1984. The original
Macintosh is the first successful mass-market
personal computer to have featured a
graphical user interface, built-in screen, and
mouse.

11. APPLE MACINTOSH (MAC)

12. LAPTOP COMPUTER
(NOTEBOOK)
• A laptop or laptop computer is a small,
portable personal computer with a "clamshell"
form factor, typically having a thin LCD or
LED computer screen mounted on the inside
of the upper lid of the clamshell and an
alphanumeric keyboard on the inside of the
lower lid. The clamshell is opened up to use
the computer

14. TABLETS & SMART PHONES
• The main difference between tablets and
smartphones is obviously the size. Tablets are
much bigger than smartphones, and the
screen size is typically the
basis of measurement. ... Tablets and
smartphones typically share the same
operating; Android tablets and smartphones,
as well as the iPad and the iPhone

15. TABLETS & SMART PHONES

16. Different between RAM & ROM?
• Ram is volatile in nature as it automatically erased when computer shut
down. But Rom is not volatile when it is never erased any computer shut
downs or restart of computer.
• Ram can be accessed by the processor. Rom can’t be accessed by the
processor.
• Ram is in form of chip while, but Rom is generally optical drives made of
magnetics tapes.
• Costlier than ROM. Cheaper than RAM.
• Writing data to a RAM chip is a faster process, but ROM is a slow data
process.
• A RAM chip can store multiple gigabytes is 16 GB or more per chip, but
ROM chip typically stores only several megabytes is 4 MB or more per
chip.

18. HARDWARE IMAGES

19. Difference between Hardware & Software
• Hardware – Computer hardware includes the physical parts of a
computer, such as the case, central processing unit (CPU), monitor, speakers,
mouse, keyboard, computer data storage, motherboard, soundcard, graphics card.
By contrast software is the set of instruction that can be stored and run by the
hardware.
• Software - Software instruction that tell a computer what to do.
Software comprises the entire set of programs, procedures, and routines
associated with the operations of a computer system. The term was cointed to
differentiate these instruction from hardware .

20. HARDWARE & SOFTWARE IMAGES

21. • Application Software.
• System Software.
• Programming Software.
• While application software is designed for
computer or mobile devices, programming
software is for your computer programmers
and developers who are writing code.
• Driver software.

22. CPU PARTS
• Cabinet
• Hard Disk
• Mother Board
• Processor
• Switch Mode Power Supply
• CD & DVD Reeder

24. CABINET
• A computer case, also known as a computer
chassis, tower, system unit, or cabinet, is the
enclosure that contains most of the
components of a personal computer. Cases
are usually constructed from steel, aluminum
and plastic.

25. CABINET IMAGES

26. • Hard disk, Magnetic storage medium for a
microcomputer. Hard disks are flat, circular
plates made of aluminum or glass and coated
with a magnetic material. Hard disks for
personal computers can store up to several
gigabytes (billions of bytes) of information.
Data are stored on their surfaces in concentric
tracks.

27. HARD DISK IMAGES

28. MOTHER BOARD
• A motherboard is the main printed circuit
board in general-purpose computers and
other expandable systems. It holds and allows
communication between many of the crucial
electronic components of a system, such as
the central processing unit and memory, and
provides connectors for other peripherals.

30. • The processor, also known as the CPU,
provides the instructions and processing
power the computer needs to do its work. The
more powerful and updated your processor,
the faster your computer can complete its
tasks. By getting a more powerful processor,
you can help your computer think and work
faster.

31. Switch Mode Power Supply
• SMPS is an electronic power supply system
that makes use of a switching regulator to
transfer electrical power effectively. It is a PSU
(power supply unit) and is usually used
in computers to change the voltage to the
appropriate range for the computer.

32. Switch Mode Power Supply