The amount of time the CPU is actually executing instructions. During the execution of most programs, the CPU sits idle much of the time while the computer fetches data from the keyboard or disk, or sends data to an output device. The CPU time of an executing program, therefore, is generally much less than the total execution time of the program. Multitasking operating systems take advantage of this by sharing the CPU among several programs.
CPU times are used for a variety of purposes: to compare the speed of two different processors, to gauge how CPU-intensive a program is, and to measure the amount of processing time being allocated to different programs in a multitasking environment.
Abbreviation of Control Program for Microcomputers. Created by Digital Research Corporation, CP/M was one of the first 8-bit operating systems for personal computers. However, Digital Research Corporation made a critical strategic error by not agreeing to produce an operating system for the first IBM PC. According to the folklore, the president of Digital Research was […]
Short for cyclic redundancy check, a common technique for detecting data transmission errors. Transmitted messages are divided into predetermined lengths that are divided by a fixed divisor. According to the calculation, the remainder number is appended onto and sent with the message. When the message is received, the computer recalculates the remainder and compares it […]
- Customer Relationship Management CRM
CRM is the abbreviation for customer relationship management. Customer relationship management (CRM) entails all aspects of interaction that a company has with its customers, whether it is sales or service-related. While the phrase customer relationship management is most commonly used to describe a business-customer relationship (B2C), CRM systems are also used to manage business to […]
- Cathode-Ray Tube (CRT)
)Abbreviation of cathode-ray tube, the technology used in most televisions and computer display screens. A CRT works by moving an electron beam back and forth across the back of the screen. Each time the beam makes a pass across the screen, it lights up phosphor dots on the inside of the glass tube, thereby illuminating […]
Acronym for Create, Retrieve, Update, Delete. It is a term commonly used to describe basic database functions.