A computer is an electronic device that accepts data as input, manipulates and processes that data, and produces information as output based on instructions stored in its memory. Computers come in various types for different uses including supercomputers for processing extremely large amounts of data like weather predictions, mainframes for businesses and governments, and personal computers. Computers perform a cycle of inputting data, processing it, outputting information, and storing the results through their processing system. They are used for a variety of tasks in businesses, governments, schools, and personal life.

1. Lecture Two

2. A computer is an electronic device, operating under the control of
instructions (software) stored in its own memory unit, that can accept data
(input), manipulate data (process), and produce information (output) from
the processing. Generally, the term is used to describe a collection of devices
that function together as a system.
What is the Computer ?

3. Types of Computers
❑ Supercomputers
are used to process very large amounts of information
including processing information to predict hurricanes,
satellite images and navigation, and process military war
scenarios.
❑ Mainframes
are used by government and businesses to process very large
amounts of information.
❑ Mini-Computers
are similar to mainframes...they are used by business and
government to process large amounts of information.
❑ Personal Computers (PC)…

4. What Does A Computer Do?
• Computers can perform four general operations,
which comprise the information processing cycle.
◼ Input
◼ Process
◼ Output
◼ Storage

5. PROCESSING
SYSTEM
DATA INFORMATION

6. Uses of Computer

7. THE END
Lecture Two