This paper is presented in a class seminar in a Reputed 'A' Grade College

1. Presented : ANSIF EK

2.  Digital computers are programmable
machines that use electronic technology
to generate, store and process data. Two
terms, positive "1" and nonpositive "0,"
compose the data into a string.

3. Digital Computer
Micro
computer
Supercomputer
Mainframes
Minicomputer

5.  A microcomputer is a small, relatively
inexpensive computer with a microprocessor
as its central processing unit (CPU). It
includes a microprocessor, memory, and
input/output devices.
 Also known as “personal computer”
 Includes workstations ,desktops ,servers,
laptop and notebook
 Examples are the IBM pc,
Apple Macintoshes, Dell.

7.  Minicomputers emerged in the mid-1960s
and were first developed by IBM Corporation.
 This computer fills the space between the
mainframe and microcomputer
 This may also be called a mid-range
computer.
 Minicomputers may contain one or more
processors, support multiprocessing and
tasking, and are generally resilient to high
workloads.
 Example are DEC’S, VAX, RANGE.

9.  Mainframes are a type of computer that
generally are known for their large size,
amount of storage, processing power and
high level of reliability. They are primarily
used by large organizations for mission-
critical applications requiring high volumes of
data processing.
 Ability to run (or host) multiple operating
systems.
 Mainframes first appeared in the
early 1940s.
 The Market is dominated by IBM

11.  supercomputers consists of tens of thousands
of processors that are able to perform billions
and trillions of calculations or computations
per second.
 Supercomputers are primarily are designed to
be used in enterprises and organizations that
require massive computing power
 As of 2013, IBM Sequoia is the fastest
supercomputer to date. It has more than
98,000 processors that allow it to process at a
speed of 16,000 trillion calculations per
second.

12.  they contain most of the key components of
a typical computer, including a processor(s),
peripheral devices, connectors, an operating
system and applications.
 A large and very powerful mainframe
computer is called a supercomputer. The Cray
X-MP is an example of supercomputer. Such
supercomputers are applied to the solution of
very complex and sophisticated scientific
problem and for national security purposes of
some advance nations.