- A special register, or memory location, in the arithmetic
and logic unit of the computer processor. It is used to hold
the result of a calculation temporarily or to store data that
is being transferred.
- The electrical pathway through which a computer processor
communicates with some of its parts and/or peripherals. Physically,
a bus is a set of parallel tracks that can carry digital signals;
it may take the form of copper tracks laid down on the computer's
printed circuit boards(PCBs), or of an external cable or connection.
- A computer typically has three internal buses laid down on
its main circuit board: a data bus, which carries data between
the components of the computer; an address bus, which selects
the route to be followed by any particular data item travelling
along the data bus; and a control bus, which is used to decide
whether data is written to or read from the data bus. An external
expansion busis used for linking the computer processor to peripheral
devices, such as modems and printers.
- Emerging computer technology that allows more than one computation
at the same time. Although in the 1980s this technology enabled
only a small number of computer processor units to work in parallel,
in theory thousands or millions of processors could be used at
the same time.
- Parallel processing, which involves breaking down computations
into small parts and performing thousands of them simultaneously,
rather than in a linear sequence, offers the prospect of a vast
improvement in working speed for certain repetitive applications.