Light Pen is an input device which is used to draw lines or figures on a computer screen. It is touched to the CRT screen where it can detect faster on the screen as it passes.

Each generation of computer development is characterized by one or more hardware/software developments that distinctly improved the performance of the computers of that generation.

Charles Babbage radical ideas and concept of the Analytical Engine (It contained an ALU, basic flow control and integrated memory) makes him the father of computing.

A discipline that applies engineering principles of design and analysis to biological systems and biomedical technologies.

(i) CRT - Cathode Ray Tube
(ii) LCD - Liquid Crystal Display
(iii) LED - Light Emitting Diodes

The scanner converts any type of printed or written information including photographs into digital pulses, which can be manipulated by the computer.

(i) Microcomputer
(ii) Portal Computers

(i) Very Large Scale Integrated Circuits.
(ii) Ultra Large Scale Integration

IBM 1401, IBM 1620, UNIVAC 1108

The control unit controls the flow of data between the CPU, memory and I/O devices. It also controls the entire operation of a computer.

(i) The ALU performs arithmetic operations.
(ii) The result of an operation is stored in internal memory of CPU.
(iii) The logical operations of ALU promote the decision making ability of a computer.

(i) A computer is an electronic device that manipulates information, or data. It has the ability to store, retrieve, and process data.
(ii) Computer works faster than human being and given the values more accuracy and reliable.