1. COMPONENTS OF A COMPUTER
A Computer is used to process data and a data processing system consists of more than just machines. A computer system must contain:-
HARDWARE
SOFTWARE
HUMANWARE
OPERATIONAL PROCEDURE

2. COMPONENTS OF A COMPUTER
1. HARDWARE
Hardware refers to machines or physical equipment that performs the basic functions of the data processing cycle. Printer, Keyboard, Mouse etc.
2. SOFTWARE
A Program is a sequence of instructions, which directs a computer to perform certain functions. Programs are referred to as software. Software is generally categorized as
System Software
Application Software

3. COMPONENTS OF A COMPUTER
System Software:
Consists of programs that help the use of a computer. These programs perform tasks as organizing and maintaining data files, translating programs written in programming languages to a language acceptable to the computer etc.
Application Software
Includes programs to perform user applications. A computer program for preparing results of a public examination is an example of applications software.

4. COMPONENTS OF A COMPUTER
3. HUMANWARE
Humanware refers to the persons who design program, and operate a computer. Three principal positions for a large computer installation are
System Analyst: Main task is to study information systems and their processing requirements. They defines the applications problem, determines system specifications, recommends hardware and software and design information processing procedures.
Programmer: Code or prepare programs based on the specifications made by the systems analysts.
Computer Operator: Performs a series of well-defines tasks to keep the computer operation at maximum efficiency.

5. COMPONENTS OF A COMPUTER
4. OPERATIONAL PROCEDURES
Operations of a data processing center require an extensive and clearly defined set of procedures for performing the essential functions. These functions generally include obtaining, preparing, and entering data into the computer, processing jobs, initiating new programs and changing or deleting old ones etc.

6. CHARACTERISTICS OF COMPUTER
VOLUME OF DATA
ACCURACY
REPETITIVENESS
COMLEXITY
SPEED
COMMON DATA

7. LIMITATIONS OF COMPUTER
No Self Intelligence
No Decision-Making power
No learning power
Can't do anything without human instructions
Can’t do any adjustment as human being an do

8. INFORMATION PROCESSING CYCLE
The sequence of events in processing information, which includes-
Input—entering data into the computer.
Processing—performing operations on the data.
Output—presenting the results.
Storage—saving data, programs, or output for future use.
These processes work together and repeat over and over.

9. INFORMATION PROCESSING CYCLE