Introduction to Computer

What is Computer?

A computer is an electronic device, operating under the control of instruction stored in its own memory unit that can accept data (input), process data arithmetically and logically, produce output from the processing, and store the results for future use. It is a programmable device that can store retrieve and process data.

Computer in different fields:

Airlines:

Flight reservation (booking)

Customer Information

Schools:

Visual Aids

Grading Systems

Computer Literacy

Research

Projects

Basic Keyboarding

Offices :

Personal Records

Payroll Systems

Inventory Systems

Grading Systems

E-mail/Group chat

Conferencing

Reports

Etc.

Banks:

Customer Information

Balance Inquiry

Banking Systems

Credit Applications(savings)

Peers:

Social Networking(facebook)

Entertainment

Meeting/Schedules

Word Processing

Who invented Computer?

DATA FLOW CYCLE / INFORMATION PROCESS CYCLE

Input unit

Output unit

Process unit

Storage unit

Communication unit

The sequence of events in processing information

The real answer is that many inventions contributed to the history of computers and that a computer is a complex piece of machinery made up of many parts, each of which can be considered a separate invention.

* Input Units – are units that insert data to the processor.

* Process Units – are units that perform computations and operations.

* Output Units – are units that display data called file.

* Communication Units – are units that transfer information through cables and telephone lines.

* Storage Units – are units that stores file.

FOUR BASIC FUNCTION OF A COMPUTER

* Input – using the input devices to tell the computer what to do.

* Process – following the instruction of the user’s input and putting it to action.

* Output – the displaying of data that was processed by the processor

* Storage - the storing of information that have been processed.

COMPARISON TO HUMAN ANATOMY...