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BASIC COMPUTER

CONCEPTS

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An electronic device, operating under the control of instructions stored in its own memory units, that can accept data (INPUT), manipulate the data according to specified rules (process), produce information (output), from the processing, and store the results for future use

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What is a computer?

What dose a computer do?

• Input• Process• Output • storage

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INPUT DEVICES

• Any hardware component that allows you to enter data, programs, commands, and user responses into a computer

• Input devicesExamples• Keyboard• Mouse

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• Output devices make the information resulting

from processing available fore use

• Output Devices Examples

• Printers

• Display Devices

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Storage Devices

Removable

Floppy disk or diskette

Compact disc CD-R, CD-RW, CD-ROM

Tape

Flash drive

Zip disk

Non-removable

Hard disk

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SYSTEM UNIT

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• The motherboard or system board is the main circuit board of system unit.

• The processer also called the central processing unit (CPU) interprets and

carries out the basic instructions that operate a computer.

• The control unit interprets the instructions.

• The arithmetic /logic unit (ALU) perform the logic and arithmetic processes.

• Memory also called random access memory or RAM.

Types of Computers

• Super computers

• Mainframes

• Micro computers

• Desktops

• Laptops

• handhelds

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Operating Management Load, store and execute programs

Transfer data

File Management Files

Folder

System Maintenance Virus check

Check disk

System Monitoring

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*A communications devices is a hardware

components that enables a computer to send

and receive data, instructions, and information

to and from one or more computers

*Communications occur over transmission

media, such as telephone lines, cables, cellular

radio networks, and satellites

COMPUTER SOFTWARE

• System software consist of programs to control the operations of computer equipment

• Instruction in the operating system tell the computer how to perform the functions of loading, storing, and executing an application program and how to transfer data.

• When a computer is turn on, the operating system is loaded into the computers memory from auxiliary storage

• Most computer us an operating system that has a graphical user interface (GUI)

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Word processing

Spreadsheet

Presentation graphic

Database

Contact management

Utility software – antivirus, data backup and file compression

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