Computer Fundamentals APK for Android

A computer is an electronic machine that accepts data, stores and processes data into information. The computer is able to work because there are instructions in its memory directing it.

The parts of the computer that you can see and touch, such as the keyboard, monitor and the mouse are called hardware. The instructions that direct the computer are called software or computer program.

Data which is raw facts that you the user enter into the computer is called input. This includes; words, numbers, sound and pictures. When the data is entered into the computer, the computer processes the data to produce information which is output. For example, you enter 2+2 into the computer as data, the computer processes it and the result is 4 which is information.

Computers are usually categories into three general categories:

1.Supercomputer The fastest, largest, most powerful and most expensive computer.

2.Mainframe Computer This is a little smaller and less powerful than the supercomputer, but, like the supercomputer it is also expensive.

3.Personal Computer (PC)- This is the computer that most people use in their daily lives. This computer is much smaller, less powerful and less expensive than the supercomputer and the mainframe computer. There are two main types of personal computers. Macintosh (Macs) and the PC compatibles (PC). The main differences between the two are the operating systems and the processor they use. This category of computer has two additional types of computers. These are mobile computer and handheld computer. The most popular type of mobile computer is the notebook or laptop computer, and the handheld computer is a very small PC that you can hold in your hand.

Topics Covered in This App are Listed Below

A Brief Computer History

Computer - Overview

Computer Fundamentals

Storage Media - Overview

Computer - Applications

Computer - Generations

First Generation

Second Generation

Third Generation

Fourth Generation

Fifth Generation

Computer - Types

PC (Personal Computer)

Workstation

Minicomputer

Mainframe

Supercomputer

Computer - Components

Input Unit

CPU (Central Processing Unit)

Output Unit

Computer - CPU

Memory or Storage Unit

Control Unit

ALU(Arithmetic Logic Unit)

Computer - Input Devices

Keyboard

Mouse

Joystick

Light Pen

Track Ball

Scanner

Digitizer

Microphone

Magnetic Ink Card Reader (MICR)

Optical Character Reader (OCR)

Bar Code Readers

Optical Mark Reader (OMR)

Computer - Output Devices

Monitors

Cathode-Ray Tube (CRT) Monitor

Flat-Panel Display Monitor

Printers

Impact Printers

Character Printers

Dot Matrix Printer

Daisy Wheel

Line Printers

Drum Printer

Chain Printer

Non-impact Printers

Characteristics of Non-impact Printers

Laser Printers

Inkjet Printers

Computer - Memory

Cache Memory

Primary Memory (Main Memory)

Secondary Memory

Computer - Random Access Memory

Static RAM (SRAM)

Dynamic RAM (DRAM)

Computer - Read Only Memory

Computer - Motherboard

Computer - Memory Units

Computer - Ports

Computer - Hardware

Relationship between Hardware and Software

Computer - Software

System Software

Application Software

Computer - Number System

Decimal Number System

Binary Number System

Octal Number System

Hexadecimal Number System

Computer - Number Conversion

Decimal to Other Base System

Other base system to Decimal System

Other Base System to Non-Decimal System

Shortcut method - Binary to Octal

Shortcut method - Octal to Binary

Shortcut method - Binary to Hexadecimal

Shortcut method - Hexadecimal to Binary

Data and Information

Data Processing Cycle

Networking

Operating System

Internet and Intranet

Computer - How to Buy?

Computer - Available Courses

Diploma Courses

Computer Care

The System Unit

Microcomputers

Cache Memory

Instruction Cycle

Interconnecting The Units Of A Computer

Types Of OS