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Category: Computer Studies/ICT (Junior Classes)

CONVERSION OF OTHER BASES TO DENARY SYSTEM

Conversion of other bases to denary system. To convert numbers in the other bases to denary system, expand the given number in power of its bases.
Examples:
1. Convert 35416 to denary
35416 = 3 x 162 + 5 X 161 + 4 x 160
= 3 x 256 + 5 x 16 + 4 x 1

NUMBER BASES

NUMBER BASES

Number bases refer to ways of counting numbers. Counting started way back in the ancient times when began counting first, with his fingers.

He counts in tens maybe because he has ten fingers and this is called decimal system of counting.

There are different bases of counting,

APPLICATION SOFTWARE

An application program (app or application for short) is a computer program designed to perform a group of coordinated functions, tasks, or activities for the benefit of the user. Examples of application include a word processor, a spreadsheet, an accounting application, a web browser, a media player, a console game or photo editor.

Translator

TRANSLATOR

A computer language translator is a program that translates a set of code written in one programming language into a functional equivalent of the code in another programming language.

Translator – usually included within programming software – translators convert high-level code into machine code.

Assemblers

OUTPUT DEVICES

OUTPUT DEVICES: An output device is any piece of computer hardware that is used to output data that has been previously entered into a computer or similar processing device.

OPERATING SYSTEM

An operating system (OS) is system software that manages computer hardware and software resources and provides common services for computer programs. The operating system is a component of the system software in a computer system

THE COMPUTER SOFTWARE

Computer software or simply software is any set of instructions that direct a computer to perform specific operations. Computer hardware and software require each other and neither can be realistically used without the other.

COMPUTER HARDWARE

Computer hardware is the physical parts or components of a computer, such as the monitor, mouse, keyboard, computer data storage, hard disk drive (HDD), graphic cards, sound cards, memory, mother board, and so on. Examples of computer hardware are

Input devices – mouse, scanner, light pen, joystick, etc.
Output devices – printer, monitor, plotter, speaker
Storage devices – primary memory and secondary – RAM, ROM, hard disk, CD/DVD ROM, flash drive, memory card, magnetic disk, etc.
Processing devices – Arithmetic and Logic Unit (ALU) and Control Unit (CU)
Other devices – computer case, cooling fan, heat sink, cables and connectors, etc

THE COMPUTER SYSTEM

THE COMPUTER SYSTEM

A computer system is one that is able to take a set of inputs, process them and create a set of outputs. This is done by a combination of hardware and software.

The computer system has one or more inputs to provide data. This data is then processed in some way. The outcome of the processing is sent to output or it may be stored until some event happens to cause it to be output.

GENERATION OF COMPUTERS

Generation of Computers

A generation is often referred to as the state of improvement in the development of a product. The generation of a computer is the advancement of computer technology from time to time.

In every generation, the circuitry has become smaller and more advanced than the previous generation. Each generation of computer is characterized by major technological development.

There are five generations of computer which are:

First-generation (1940 – 1956)
Second generation (1956 – 1963)
Third generation (1964 – 1971)
Fourth generation (1971 – 1983)
Fifth-generation (1983 – present and

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