2) MINI
COMPUTERS:
These systems are more powerful than microcomputer and also
more expensive. The processing speed of computer measured in terms of “M I P S”
(Million Instructions Per Seconds).
3) MAIN
FRAME COMPUTERS
These are large machines with terminal meant to be used
by 200 & above users. The processing speed is 10 MIPS. These Computers
Support a large memory. Ex: - VAX-8800, SYBER-180
4) SUPER
COMPUTER
Super Computers are the fastest computer and can be used to
solve a wide range of Large-Scale problems. Which require extensive numeric
computations like Weather Forecasting, Missile Technology, Geology and in
varies other Scientific Avenues. The Processing Speeds are 100 M.I.P.S.
Ex:-CRAY-2 (U.S.A. ),
NEC-SUPER (JAPAN INDIA
HARDWARE AND SOFTWARE
A Computer system can be
broadly classified into two parts, namely
1. HARDWARE 2.
SOFTWARE
1. HARDWARE:
The hardware
comprises the physical components of the system which can be seen and handled,
for Ex: - Key board, V.D.U, printer, etc
2. SOFTWARE:
A creation of programmer in a typical payroll application is known software.
Software is nothing but a set of programs. And sequential order it perform
specific task software can be broadly divide into two categories, namely,
1) Applications Software 2) Systems Software
1) APPLICATIONS SOFTWARE’S
Applications
software denotes those computer programmes that are developed for specific
applications like Material Systems, Billing and Dispatch and financial
accounting etc.
It is a set of programs,
which are written by computer users of programmers to meet their information
processing requirement some of the common applications software are as follows.
A) Graphics:
These packages allow the user to do various
kinds of computer graphics designing and drafting of various documents etc, and
be easily achieved using these packages. Example:
- Auto Cad, Harvard - Graphics.
B) Word processing:
These designed for the creation and
manipulation of textual matter, these have features for addition modifying
documents.
Example: Word star, Word Perfect, Microsoft-Word.
C) Spread Sheet:
These are data analysis packages used for
generating financial reports, projection, and other various number of
operations.
Example:-Lotus 1 2 3, VP- planer, Microsoft – Excel
2) SYSTEM SOFTWARE’S:
System software is a
collection of master programs designed to operate the computer and its
activities. System software is either provided by the computer manufacturer or
independent software developers. Development of system software is called
“systems programming”.
System software is a software, which
directly Inter-Act with computer hardware. Without the system software cannot
start the computer system. System software is also known as Operating System
(O.S).
The operating system is software that controls the entire
operations of the computers system. The primary objective of “O.S” is a
efficient management of computer resources such as C.P.U, peripherals, etc.
Examples of well known O.S. are MS-DOS, MS – WINDOWS,
LINUX, UNIX, and XENIX, etc. In systems used is either Single User Operating
System (or) Multi User Operating System.
Short notes on Hardware’s and Software’s:
|
Hardware
|
Software
|
|
Hardware is a collection of physical parts
|
Software is a collection of programs
|
|
Hardware is backbone for computer to run
|
Software is used for and Application
|
|
Hardware consist of Keyboard, Mouse, VDU, Printer etc
|
Software is two types
1) System Software 2) Applications Software
|
LANGUAGES
Instructions to the computer
are given with the help of computer languages. The language is a means of communication.
These languages can be classified as follows.
I) LOW LEVEL LANGUAGE
A) Machine Language B) Assembly Language
II) HIGH LEVEL LANGUAGE
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