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)