A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

C

CD-ROM
acronym for compact disk read-only memory; a form of optical disk onto which data has been stored and can be viewed but not be changed.

Cache
extra temporary storage that increases processing speed.

Calendaring and scheduling software
software that electronically checks calendars and then schedules meetings to fit those calendars.

Cell
the intersection of a vertical column and horizontal row on a spreadsheet, representing one location for entry of data.

Central processing unit (CPU)
hardware component where processing of data occurs, along with control activities for other components.

Circuit-switched service
communications service in which the facilities are shared and are therefore less expensive than a dedicated circuit.

Class
person, place, or thing of interest in an object-oriented system.

Client/server model
a system that includes at least one server-a computer that provides a service to at least one other computer (a client); often referred to as a distributed system.

Clock speed
the number of electronic pulses per second, measured in megahertz.

Codec
device that converts analog video and audio data into digital signals.

Command-driven system
an operating system format in which words (commands) are entered to indicate desired activities.

Commercial online service
an organization that provides various electronic communication capabilities or services for a fee.

Common carrier
an organization that provides a common type of communications service to many people, such as telephone service.

Communications software
provides instructions to hardware for transmission of data from one computer to another.

Competitive advantage
an organization's unique qualities that allow it to compete successfully with other organizations offering similar projects or services.

Compiler
a language translator that converts an entire program into machine language and retains the translated code for future use.

Concurrent processing
a capability that allows more than one task at a time to be in some stage of execution, although one processor can actually be processing only one task at a given moment.

Configuration management
maintaining records and monitoring the ways in which components of a system are set up to work with each other.

Context-sensitive help screen
help facility that, when activated, displays the help topic related to the current activity being performed.

Control program
instructions for the computer system that are designed to manage the various activities, such as input and output of data.

Control unit
CPU component that coordinates the activities of other components.

Cross-functional relationship
system that links data from multiple business functions to provide better information.

Cylinder
track location on multiple disks that is in the same vertical position.