OXIDE A ferrous material that can be magnetized;
also, the recording side of the magnetic tape (dull
PARALLEL PROCESSING Handling all the
elements of a word or message simultaneously.
PASCAL High-level structured programming
language that has gained wide acceptance as a tool
for both applications programming and system
PENTIUM CHIP A processor chip that can execute
many instructions at the rate of two instructions per
PERIPHERAL EQUIPMENT Equipment used for
data entry, storage, or retrieval, but which is not part
of the central processing unit. Peripherals include
crt displays, terminals, printers, and mass storage
(tape, disk, and drum) devices.
PHOTOELECTRIC CELL A mechanism that
when activated by a light source emits an electrical
QUERY To make a request for information from a
RECONCILING Refers to the correcting of
R E L A T I O N A L D A T A B A S E A database
organization scheme that treats files as tables of
data in which the rows represent fixed-length
records and columns represent fields.
RIGID Refers to the hard metal platters (usually
constructed of aluminum or glass) that comprise a
SCHEMA Structure for organizing knowledge
relative to context or expectations.
SCRATCHING MAGNETIC MEDIA Making the
magnetic media available to the computer operator
SCSI ADAPTER A general purpose parallel
interface designed for connecting one or more
computers and one or more peripherals. A total of 8
devices may be connected to one bus.
SEMICONDUCTOR A crystalline substance that
conducts electricity when it is doped with
SERIAL Pertaining to the sequential occurrence of
two or more related activities in a single device.
SILICON CHIP Tiny portion of a silicon wafer with
thousands of electronic components and circuit
patterns etched on its surface.
SIMPLEX A mode of data transmission in which
data can travel in only one direction on the line.
When a terminal is connected to such a circuit, it
can be used to either receive or send data to the cpu
but not do both.
SINGLE-FILE DIRECTORIES An option of the
operating system that allows for only one file to be
contained in a directory.
SOFT-SECTORED Method of marking sectors or
sections on a disk by using information written on
SPECIAL FUNCTION KEY Key on a keyboard to
control a mechanical function, initiate a specific
computer operation, or transmit a signal that would
otherwise require multiple key strokes.
STAND-ALONE Self-contained computer system
that can work independently, not connected to or
under the control of another computer system.
STRIPPING The removing of the first 100 feet of the
magnetic tape. This is the portion that becomes
contaminated and causes the most errors.
SUBSCHEMA Logical organization of data
required for a particular program.
SURGE PROTECTOR Device that protects
electrical equipment from being damaged by short
surges of high voltage by filtering them out.
TIMING The regulation of the flow of signals that
control the operation of the computer.
TREE STRUCTURED DIRECTORY A disk
containing a root directory and several