(1) A collection of wires through which data is transmitted from one part of a computer to another. You can think of a bus as a highway on which data travels within a computer. When used in reference to personal computers, the term bus usually refers to internal bus. This is a bus that connects all the internal computer components to the CPU and main memory. There’s also an expansion bus that enables expansion boardsto access the CPU and memory.
All buses consist of two parts — an address busand a data bus. The data bus transfers actual data whereas the address bus transfers information about where the data should go.
The size of a bus, known as its width, is important because it determines how much data can be transmitted at one time. For example, a 16-bit bus can transmit 16 bits of data, whereas a 32-bitbus can transmit 32 bits of data.
Every bus has a clock speed measured in MHz. A fast bus allows data to be transferred faster, which makes applications run faster. On PCs, the old ISA bus is being replaced by faster buses such as PCI.
Nearly all PCs made today include a local bus for data that requires especially fast transfer speeds, such as video data. The local bus is a high-speed pathway that connects directly to the processor. Several different types of buses are used on Apple Macintosh computers. Older Macs use a bus called NuBus, but newer ones use PCI.
- bus mastering
Refers to a feature supported by some bus architectures that enables a controller connected to the bus to communicate directly with other devices on the bus without going through the CPU. Most modern bus architectures, including PCI, support bus mastering because it improves performance.
- bus mouse
A mouse that connects to a computer via an expansion board. Another type of mouse is a serial mouse, which connects to a serial port. Serial mice are easier to install, but the advantage of bus mice is that they do not use up the serial port, so you can use the port for a […]
- bus network
)A network in which all nodes are connected to a single wire (the bus) that has two endpoints. Ethernet 10Base-2 and 10Base-5 networks, for example, are bus networks. Other common network types include star networks and ring networks. For network diagrams, see Network Topology Diagrams in the Quick Reference section of
- business process
(biz´n&s pros´ses) (n.) (1) A business transaction that requests information from or changes the data in a database. (2) A specific event in a chain of structured business activities. The event typically changes the state of data and/or a product and generates some type of output. Examples of business processes include receiving orders, invoicing, shipping […]
- business recovery team
A group of individuals responsible for maintaining the business recovery procedures and coordinating the recovery of business functions and processes. Also called a disaster recovery team. [Source: Disaster Recovery Journal]