Computer Basics

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created 7 years ago by ReznikMhjhs
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updated 7 years ago by ReznikMhjhs
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1

Computer

Device that accepts input,Processes data, produces output and stores information.

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input

Information fed into the Computer system.

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processing

To carry out operations on data or programs.

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output

Useful information that leaves the system.

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Data

Raw material ready for processing

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Information

Data that has been processed and turned into useful facts

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Storage

Area of the computer that holds data on permanent basis

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kilobyte (KB)

1,000 bytes

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megabyte (MB)

1 million bytes

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gigabyte (GB)

1 billion bytes

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terbyte (TB)

1 trillion bytes

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Boot process

starting up the computer

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Boot sector

A small program on the hard drive that tells the computer how to begin loading programs

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Binary or binary 2 numbering system

a method for representing letters or numbers only using two digits, 0 and 1. most basic level of communicating with computers.

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ASCII

A number assigned to each letter and character in the alphabet

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Bit

Each 0 or 1

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Byte

8 bits

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Personal computer or microcomputer

A personal computer based on a microprocessor

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Desktop

Personal computer that fits on a desk more power and storage for less cost than a laptop

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laptop

a portable computer all components contained within the laptop

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Workstation

A desktop computer that is part of a local area network

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mainframe

Large, expensive computer able process data for thousands of users at the same time

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Supercomputer

Fastest most powerful computers available

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servers

provides servicces to other computers over a network

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PDA

Personal Digital Assistant. Small portable device with network capabilities

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Smartphone

A cell phone that offers many features including internet access and applications (apps)

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Tablet

A wireless, portable personal computer hich uses a touchscreen

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hertz

measures speed of the central processing unit (CPU)

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Megahertz

1 million cycles per second

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gigahertz

1 billion cycles per second

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pixel

the basic unit of an image

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resolution

the amount of pixels on a screen - the more pixel the better resolution