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A computer is

an electronic device that processes data and converts it into information that people can use.

technology refers

to the practical application of
an art or skill.

Moore's Law.

Moore's Law. Moore predicted that the number of transistors in computer circuits would double every couple of years. As it turns out, his prediction has been fairly accurate.


or electronic commerce, is the buying and selling of products and services over the Internet.


monitoring and
watching people

personal computer (PC)

is used by one person at a time. Desktop and laptop computers, MP3 players, and personal digital assistants (PDAs) are all examples of PCs, which are also called microcomputers.


computer is designed to remain in one location.

A laptop computer

is designed to be carried from place to place.

personal digital assistant (PDA) is a computer that

is small enough to hold in one's hand. With PDAs, people can track appointments, store addresses, and keep notes.

A minicomputer

used by several people, even up to hundreds of people at once. These computers are used in small- to medium-sized organizations, such as schools, hospitals, hotel chains, banks, and churches.

A mainframe

or supercomputer, is large enough to fill several rooms. These computers are used by thousands of people at the same time in organizations such as government agencies.

Ergonomics is the study of

the relationship between humans and the objects that we use.


are people who study human anatomy in order to determine how the objects that we use can be made safer, more comfortable, and more efficient.

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