Unit 1 hardware and software (part 1)

Application software-software designed to meet the user's need; performs a specific task.

CD-ROM- a compact disc that only reads only memory

Channel- the media that carries or transports the message. (telephone wire, coaxial cable, microwave signal, or fiber optic)

Computer- an electronic device that recieves data, processes data, stores data, and produces a result.

Control Unit- the part of the computer that directs instructions.

CPU-Central Processing Unit; the brain of the computer.

Data- new facts entered into the computer to be processed, which consist of text, numbers, sounds, and images.

Desktop computer-designed to be used on a desktop.

Disk-a storage device.

Dot Matrix Printer- uses a pattern of dots to form words and images on paper.

Ergonomics- the science of desiging equipment and workspace for a comfortable and safe working environment.

File- a document stored on a disk.

File server- the central computer where the data and software for local area network computers are stored.

Hard copy- a printed copy of output.

Hard Disk/Drive- a device that holds information such as software and files.

Hardware- physical parts of a computer.

Information Processing Cycle- the interactions with humans and computers that consist of input, processing, output, and storage.

Inkjet printer- sprays ink through small holes to form words and pictures on paper.

Input- the process of entering information into a computer.

IPOS- input, processing, output, and storage.

Keyboard- contains numbers letters symbols, and function keys; looks like a type writer.

Laptop computer- designed to be small enough and light enough to be used on your lap.

Laser Printer- uses light beams to form words and images on paper.

Local Area Networks- computers connected together in a relatively close location such as in the same buildings or department.

Mainframes and minicomputers- used by business and government to process large amounts of information.

Microcomputer- a smll computer in which the central processing unit or CPU is a single silicon chip.

Modem- Modulator-Demotulator. A device that connects the computer to a telephone line.

Network- when computers are connected to other computers that can share information and sometimes hardware (printers)