This document summarizes key characteristics of computer systems. It discusses their speed in performing operations in microseconds or nanoseconds. Computers are reliable if the input data and programs are correct, otherwise errors may occur. Computers are also highly accurate, able to perform hundreds of thousands of operations error-free for days. They have nearly unlimited storage capacity for data and instant recall. Computers can transfer data between each other very quickly, in less than a second. They are versatile and can perform simple to complex tasks for extended periods. Computers also communicate between networks.

1. COMPUTER
SYSTEM

2. CHARACTERISTICS OF
COMPUTER!

3. SPEED
A computer can add and subtract numbers,
compare letters to determine alphabetic
sequence, move and copy numbers and
letters.
As such, there is nothing profound in these
operations. What is significant is the speed
with which computers carry out these
operations.
This speed varies from a few
microseconds (millionth of second) to Nano
(billionth of second)..

4. RELIABILITY
• Computer output is generally very
reliable, subject to the condition
that the input data entering the
computer should be correct and the
program of instructions should be
reliable and correct.
Incorrect input data and unreliable
programs give us computer errors
and wrong results.
Hence, the phrase GARBAGE IN-
GARBAGE OUT (GIGO).

5. ACCURACY
You may work for years before experiencing
a system error, such as an updating of the
wrong record or and incorrect addition.
Errors do occur in computer-based
information but precious few can be
directly attributed to the computer
systems.. These are human errors.
Hardware errors are usually detected and
corrected by the computer system itself.
Computers are very accurate. They can
perform their hundreds of thousands of
operations with great accuracy. They can
run error less for days at a time.

6. STORAGE CAPACITY
• Computer systems have total and
instant recall of data and an
almost unlimited capacity to
store these data.
• A typical mainframe computer
system will have many billions of
characters, and perhaps
thousands of graphic images,
stored and available for-instant
recall.
• When properly used, a computer
can improve the efficiency of an
organization. It provides a fast,
accurate, and reliable device with
which to process data.

7. QUICK DATA TRANSFER
Computers can transfer
data (information) very
quickly from one
computer to another. A
computer can send the
entire text of an
encyclopedia to another
computer in less than
one second , hence ,
making our work very
easy.

8. VERSATILITY
Computers are versatile (can do many
types of jobs). It can carry out processes
ranging from simple mathematical
calculations to highly complex and logical
evaluations for any extended period of
time.
Computers can communicate with other
computers and can receive and send data
in various forms such as text, video, etc.
This ability of computer
to communicate to one another has led to
the development of computer networks.
Internet, and so on.

9. WEAKNESSES OF
COMPUTER SYSTEM!

13. PRESENTSTION BY -
NAME…….DIVYANSHI
SINGH
CLASS………IX-A
ROLL NO….9116