Computer literacy Program…Introduction to Computer
Chapter-1
Introduction
to
Computer
1
, Computer literacy Program…Introduction to Computer
INTRODUCTION TO COMPUTER
What is a Computer?
An electronic device that accepts input, stores large quantities of data, execute complex
instructions which direct it to perform mathematical and logical operations and outputs the
answers in a human readable form.
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.
Characteristics about computer
The major characteristics of a computer are high speed, accuracy, diligence, versatility and
storage.
1. Speed: - Computer can work very fast. It takes only few seconds for calculations that we take
hours to complete. Computer can perform millions (1,000,000) of instructions and even more per
second.
2. Accuracy: - The degree of accuracy of computer is very high and every calculation is
performed with the same accuracy. The accuracy level is 7 determined on the basis of design of
computer. The errors in computer are due to human and inaccurate data.
3. Versatility: It means the capacity to perform completely different type of work. You may use
your computer to prepare payroll slips. Next moment you may use it for inventory management or
to prepare electric bills.
4. Power of Remembering: Computer has the power of storing any amount of information or
data. Any information can be stored and recalled as long as you require it, for any numbers of
years. It depends entirely upon you how much data you want to store in a computer and when to
lose or retrieve these data.
5. Storage: - The Computer has an in-built memory where it can store a large amount of data.
You can also store data in secondary storage devices such as floppies, which can be kept outside
your computer and can be carried to other computers.
Uses of computer
1. USE OF COMPUTER IN BUSINESS
Marketing, Stock exchange, Banks, Departmental stores.
2. COMPUTERS IN BANKS • Handle trading in multiple currencies
• Automatic teller machine
• Facsimile (FAX), electronic mail (E.mail), and voice mail are used to transfer
messages etc conveniently and easily
2
Chapter-1
Introduction
to
Computer
1
, Computer literacy Program…Introduction to Computer
INTRODUCTION TO COMPUTER
What is a Computer?
An electronic device that accepts input, stores large quantities of data, execute complex
instructions which direct it to perform mathematical and logical operations and outputs the
answers in a human readable form.
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.
Characteristics about computer
The major characteristics of a computer are high speed, accuracy, diligence, versatility and
storage.
1. Speed: - Computer can work very fast. It takes only few seconds for calculations that we take
hours to complete. Computer can perform millions (1,000,000) of instructions and even more per
second.
2. Accuracy: - The degree of accuracy of computer is very high and every calculation is
performed with the same accuracy. The accuracy level is 7 determined on the basis of design of
computer. The errors in computer are due to human and inaccurate data.
3. Versatility: It means the capacity to perform completely different type of work. You may use
your computer to prepare payroll slips. Next moment you may use it for inventory management or
to prepare electric bills.
4. Power of Remembering: Computer has the power of storing any amount of information or
data. Any information can be stored and recalled as long as you require it, for any numbers of
years. It depends entirely upon you how much data you want to store in a computer and when to
lose or retrieve these data.
5. Storage: - The Computer has an in-built memory where it can store a large amount of data.
You can also store data in secondary storage devices such as floppies, which can be kept outside
your computer and can be carried to other computers.
Uses of computer
1. USE OF COMPUTER IN BUSINESS
Marketing, Stock exchange, Banks, Departmental stores.
2. COMPUTERS IN BANKS • Handle trading in multiple currencies
• Automatic teller machine
• Facsimile (FAX), electronic mail (E.mail), and voice mail are used to transfer
messages etc conveniently and easily
2
