main components
What is new?home basic computer parts motherboard processormemory monitor hard drivesCD/DVD driveskeyboardmousecomputer cards power supply computer case
dicount productstips and articles how to format pc build computer PC troubleshootingcomputer speed up computer security computer networksUseful Linksonline pc parts store computer buying tipsonline pc courses computer terms computer books computer software contact us
computer accessories
laptop parts used computers computer gadgets
other information
site map About me

Glossary of computer terms

Here I have listed some of the most common glossary of computer terms. I am not saying that this is a complete list; however, these are the most popular computer terms found on the net.


Anti-Virus program

Anti-virus program is an application developed to protect a computer from virus, worm, Trojan and other kinds of malicious codes. The application continuously checks for viruses entering into a system.

If a virus is detected, it will do one of the three methods: repair the infected file or quarantine the file so that it won’t be accessible to programs or delete the infected file.

Application software

Application software is a kind of software developed to carry out a specific task on a computer. Ex. AutoCAD, word processing, etc.


Bluetooth is a wireless network technology used to connect Bluetooth enabled devices at short distance (up to 40m) without using cables. It is a common communication method to transfer data between cell phones and laptops.


Broadband is high speed internet connection. Several types of broadband connection exist. DSL (digital subscriber line), satellite and leasing a line are among popular ones.

Cache memory

Cache memory is very high speed memory (RAM) type used to hold information frequently used by computer processor. Recent system units incorporate more than two levels of cache memory (L1, L2, L3 and L4).

glossary of computer terms

Card Reader (Memory card readers)

It is a device which can be connected directly to a computer through USB and used to read flash memory cards inserted in it. Commonly it is used to copy data from cell phone and digital camera memory cards to a computer. Depending on the reader type and specification, it can hook different types of memory cards such as CF (compact flash), SD (secure digital), mini-SD, RS-MMC, SM, MS-Pro, MS Pro Duo and others.

Clock speed

Clock speed is a device that sends pulses to a CPU. It is measured in MHz and GHz. The higher the clock speed of a computer the faster the CPU.

Computer virus

A computer virus is a software program capable of destroying computer data. It spreads by copying itself without the knowledge of a user. It halts, disrupts and changes the normal operation of system. It also corrupts and damages files stored in a computer.

Desktop computer

Desktop computer is a type of computer designed for users who work in an office or home. As the name implies it is put on desk or table. It is ideal for office workers.

glossary of computer terms

Dial-up connection

Dial-up connection is used to connect to the internet using a standard telephone line. A computer connects with the telephone line via a modem. Its maximum transfer speed is 56 kilobytes per second. And it is the most slow internet connection.


Electronic commerce (E-commerce) is handling business transactions online. It is the exchange of goods and services through internet. In the modern world, it is possible to purchase and sell products online without leaving home.


Extranet is a type of network when limited content of intranet network is available for users outside company’s employees such as other businesses, clients or suppliers.

glossary of computer terms


Firewall is a system used to secure or protect a computer or a network from unauthorized access by outside users. Usually, it is applicable when using internet and a network.

According to the type of firewall software, it is easy to configure so that each connection is monitored. Microsoft Windows has built-in Firewall in all versions of latest operating software (XP, Vista and 7).

Flash Memory (USB flash drive)

Flash memory is a device used to transport files between computers. It can be directly connected to a computer USB port. Flash memory is handy and store files like a normal hard disk. 4GB, 8GB, 16GB and 32GB are the most common sizes. It is recommended not to use flash memory as a backup media.


Freeware is any type of software available for free. However, it is copyrighted therefore can’t be changed or put for resale.

Graphics card (Video display adapter)

Graphics card is one of the expensive components in a computer system which serves as an interface between a computer and screen. It controls what we see on computer monitor.

Hard disk

Hard disk or hard drive is a device used to store all applications and data in a computer. It is housed in a computer case.

Different sizes of hard disks are available and its capacity is still increasing. Portable hard disk is the same with the standard disk, but handy to take it around. It is designed to take backups and personal data.

continue to read more glossary of computer terms on next page


Return back from glossary of computer terms to computer parts

Related Articles

Computer abbreviations

Popular Computer definitions

Brief Outline of Computer timeline

format computer guide
Don't worry -- your e-mail address is totally secure.
I promise to use it ONLY to send you PC Tips.
ListWire - Free Autoresponders
click here for your free autoresponder

Home | basic computer parts | computer buying guide | sample laptop specification
processor | how to upgrade computer memory | motherboard |tips and articles

Copyright©2010 | | Privacy Policy | All Rights Reserved