Introduction To Computers | Computer Software

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Definition of a computer

A computer is an electronic device which is capable of receiving the inputs (data from the user), storing it for a

desired period of time, manipulating it according to the set of instructions (called program) and producing the

output to the user in desired form. It performs a variety of operations in accordance to the set of instructions.

Also, Computer is an electronic because it contain some electronic component such as resistor, transistor,

capacitor and integrated circuits.

Your "computer" is a programmable electronic collection of devices that function as a unit which can store,

retrieve and process data. This collection includes a System Unit, a Keyboard, a Monitor and a Mouse.

2. Sysytem Unit

2.2. Computer Software

COMPUTER SOFTWARE
Software refers to a series of electronic instructions that tell a computer how to perform tasks.
Considerations when choosing computer software
1. Authenticity-genuine, valid, legitimate
2. Documentation-details to install, use and maintain
3. User needs-software solves the user problems
4. Reliability and security-software must do tasks its designed to do and provide safety to data.
5. Compatibility and system configurations like hard disk space, amount of memory , processor
speed-the computer must support the software to be installed
6. User friendliness-ease of use and learning
7. Cost –price must be reasonable
8. Portability-software should be easily copied from one computer to another
Computer software is divided into two categories:
1. System software 2. Application software
System software
System software refers to programs which manages the operation of the computer itself.
System software consists of programs that control the operation of the computer and its devices.
Functions of system software
1. Starting up a computer
2. Transferring data between input and output devices
3. Storing and retrieving files
4. Formatting disks
5. Sorting data files
System software is divided into three categories
1. Operating system
2. Utilities
3. Programming
languages
Operating system
An operating system is a set of programs that coordinate the operation of all hardware and application
software components of a computer.