IBM PC 300GL Types 6275, Информационное руководство

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picture element (pel) . In computer graphics, the
smallest element of a monitor surface that can be
independently assigned color and intensity.
pin . One of the conducting contacts of an electrical
connector.
pipeline . A serial arrangement of processors or a
serial arrangement of registers within a processor.
Each processor or register performs part of a task
and passes results to the next processor; several
parts of different tasks can be performed at the same
time.
plotter . An output unit that directly produces a
hardcopy record of data on a removable medium, in
the form of a two-dimensional graphic
representation.
Plug and Play device
. A device that is
auto-configuring. A Plug and Play device comes
with built-in identification and configuration
specifications that enable the computer BIOS to
automatically configure the device and assign it
computer resources. Contrast with legacy device.
port . An access point for data entry or exit.
POST . Power-on self-test.
power-on self-test (POST) . A series of diagnostic
tests that are run automatically by a device when
the power is turned on.
priority . (1) A rank assigned to a task that
determines its precedence in receiving system
resources. (2) The relative significance of one job to
other jobs in competing for allocation of resources.
processing . The performance of logical operations
and calculations on data, including temporary
retention of data in microprocessor storage while the
data is being handled.
processor . A functional unit that interprets and
executes instructions. A processor consists of at
least an instruction control unit and an arithmetic
and logic unit. See microprocessor and central
processing unit.
program . (1) A sequence of instructions that a
computer can interpret and execute. (2) To design,
write, modify, and test computer programs.
programmable read-only memory (PROM) . A
storage device that, after being written to once,
becomes read-only memory.
PROM . Programmable read-only memory.
prompt . A visual or audible message sent by a
program to request the user's response.
R
random access memory (RAM) . (1) A storage
device in which data can be written and read. (2) A
storage device into which data is written and from
which data is read in a nonsequential manner.
read . To acquire or interpret data from a storage
device, from a data medium, or from another
source.
read-only memory (ROM) . Memory in which
stored data cannot be modified by the user except
under special conditions. See also EEPROM,
EPROM, and PROM.
record . (1) A set of data treated as a unit. (2) A
set of one or more related data items grouped for
processing.
refresh . (1) To recharge a memory location in
volatile memory with an electric current so that it
retains a state or binary value. (2) In computer
graphics, the process of repeatedly producing a
monitor image on a monitor surface so that the
image remains visible.
register . (1) An integrated circuit that contains 8,
16, or 32 storage locations, each of which can store 1
bit of binary data. See also binary. (2) An area that
stores binary data while it is being processed by the
computer.
resolution . In computer graphics, a measure of the
sharpness of an image, expressed as the number of
lines and columns on the monitor screen or the
number of pels per unit of area.
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