Short for Accelerated Hub Architecture (also called Intel Hub Architecture), Intel introduced this hub architecture starting with the 820 chipset. The hub architecture divides control between a memory controller hub (MCH) that supports memory and AGP and an I/O controller hub (ICH) that supports PCI, USB, sound, IDE and LAN. The word hub in Intel Hub Architecture refers to the north and south bridges in a chipset. Intel has replaced those two terms with the word hub.
[Image Source: INSIDE THE PC, Nigel S. Smith, University of Cambridge Computing Service]
ACID is the acronym used to describe the four properties of an enterprise-level transaction : ATOMICITY: a transaction should be done or undone completely. In the event of a failure, all operations and procedures should be undone, and all data should rollback to its previous state. CONSISTENCY: a transaction should transform a system from one […]
Short for acknowledgement code, a transmission control character used to indicate that a transmitted message was received uncorrupted or without errors or that the receiving station is ready to accept transmissions. The receiver sends the code to the sender to indicate that the transmission has been accepted. Compare with NAK.
Short for access control list, a set of data that informs a computer’s operating system which permissions, or access rights, that each user or group has to a specific system object, such as a directory or file. Each object has a unique security attribute that identifies which users have access to it, and the ACL […]
Abbreviation of the Association for Computing Machinery, an organization composed of U.S. computer professionals. Founded in 1947, the ACM publishes information relating to computer science, holds seminars, and creates and promotes computer standards.
Short for Advanced Configuration and Power Interface, a power management specification developed by Intel, Microsoft, and Toshiba. ACPI, which will be part of the next version of Windows, enables the operating system to control the amount of power given to each device attached to the computer. With ACPI, the operating system can turn off peripheral […]