Computers Fundamental

Basic Operations of Computer
1) It accepts data or instructions by way of input.

2) It stores data.

3) It can process data as required by the user.

4) It gives results in the form of output.

5) It controls all operations inside a computer.


Components of the Computer Systems
· Input Unit

· Central Processing Unit.

· Secondary Storage Unit.

· Output Unit.


Applications of Computers
· Word Processing

· Internet

· Desktop publishing

· Digital video or audio composition

· Mathematical Calculations

· Robotics

· Weather analysis


Characteristics of Computers
· Speed

· Accuracy.

· Automation.

· Endurance.

· Versatility.

· Storage.

· Cost Reduction.


Classification of Computer Systems
1. Micro computer

2. Mini Computer

3. Mainframe computer and

4. Super Computer


Functions in the Input Unit
· Keyboards.

· Computer mice.

· Light Pen.

· Digitizer.

· Touchpad.

· Trackball.

· Image scanner.

· Webcam.

· Video capture / tuner cards.

· Microphones.

· MIDI instruments.


Functions in the Output Unit
· Speakers.

· Printer.

· Headphone.

· Monitor (or) Visual Display Unit (VDU).

· Plotter.

 
Types of Computers
1. Micro computers

2. Mini computers

3. Mainframe computers

4. Super computers