Webopedia

What is the Internet? Webopedia Definition

Main » TERM » I »

By Vangie Beal

The Internet is generally defined as a global network connecting millions of computers. More than 190 countries are linked into exchanges of data, news and opinions.

The Internet is Decentralized

Unlike online services, which are centrally controlled, by design, the Internet is decentralized. Each Internet computer, called a host, is independent. Operators can choose which Internet services to use and which local services to make available to the global community. Remarkably, this anarchy by design works exceedingly well. There are a variety of ways to access the Internet. Most online services offer access to some Internet services. It is also possible to gain access through a commercial Internet Service Provider (ISP).

Internet

Is Web and Internet the Same?

The Internet is not synonymous with World Wide Web. The Internet is a massive network of networks, a networking infrastructure. It

Read More

What is a PC – Personal Computer? Webopedia Definition

Main » TERM » P »

By Vangie Beal

There are two generally, similar and accepted meanings of the phrase personal computer (PC):

1) PC is short for personal computer or IBM PC. The first personal computer produced by IBM was called the PC, and increasingly the term PC came to mean IBM or IBM-compatible personal computers, to the exclusion of other types of personal computers, such as Macintoshes.

2) A personal computer (PC) may also refer to any small, relatively inexpensive computer designed for an individual user. In price, personal computers range anywhere from a few hundred dollars to thousands of dollars. All are based on the microprocessor technology that enables manufacturers to put an entire CPU on one chip.

In recent years, the term PC has become more and more difficult to pin down. In general, though, it applies

Read More

What is a Computer? Webopedia Definition

Main » TERM » C »

By Vangie Beal

A computer is a programmable machine. The two principal characteristics of a computer are: It responds to a specific set of instructions in a well-defined manner and it can execute a prerecorded list of instructions (a program).

Modern Computers Defined

Modern computers are electronic and digital. The actual machinery wires, transistors, and circuits is called hardware; the instructions and data are called software.

Computer System

All general-purpose computers require the following hardware components:

In addition to these components, many others make it possible for the basic components to work together efficiently. For example, every computer requires a bus that transmits data from one part of the computer to another.

Computer Classification: By Size and Power

Most people associate a personal computer (PC) with the phrase computer.  A PC is a small and relatively inexpensive computer designed for an individual

Read More