- Random access memory. Semiconductor-based memory that can be read
and written by the microprocessor or other hardware devices. Refers to
volatile memory, which can be written as well as read.
- RAM digital-to-analog converter. A chip built into some VGA and SVGA
display adapters that translates the digital representation of a pixel into
the analog information needed by the monitor to display it. The presence of a
RAMDAC chip usually enhances overall display performance.
- A rectangular pattern of lines.
- raster graphics
- Also bitmapped graphics. Images defined as a set of pixels or dots
in a column-and-row format.
- The conversion of vector graphics (images described mathematically as
points connected by straight lines) to equivalent images composed of pixel
patterns that can be stored and manipulated as sets of bits.
- real time
- In computing, refers to an operating mode under which data is received and
processed; the results are returned instantaneously.
- real-time processing
- Processing that supports real-time functions such as telephony.
- Redbook audio
- The data format standard for conventional audio CDs used in home stereo
- In Windows and Windows NT/Windows 2000, the tree-structured
hierarchical database where general system hardware and software settings are
stored. The registry supersedes the use of separate INI files for all system
components and applications that know how to store values in the registry.
- Number of pixels per unit of area. A display with a finer grid contains
more pixels and thus has a higher resolution and is capable of reproducing
greater detail in an image.
- 1. Any sort of set from which a subset can be allocated for use by a
client, such as memory, bus bandwidth, or MIPS. This is not the same as
resources that are allocated by Plug and Play. 2. A general term that refers
to IRQ signals, DMA channels, I/O port addresses, and memory addresses for
Plug and Play.
- resource arbitrator
- In Plug and Play device configuration, a set of functions used by the
configuration manager to arbitrate and allocate resources on the PC.
- resource conflict
- In Plug and Play device configuration, the result of more than one device
sharing the same, nonshareable resource. Conflicts can cause the device to be
partially functional or nonfunctional, or can cause the PC to malfunction
- resource data type
- A function that describes the resource requirements of an ISA expansion
card as well as the programmability available on the card and its
- Red-green-blue. The primary colors in color video. Often used to describe
a video color-recording scheme and the equipment that uses it. Also, a
computer color-display output signal comprised of separately controllable red,
green, and blue signals (as opposed to composite video, in which signals are
combined prior to output). RGB monitors typically offer higher resolution than
composite monitors. Compare with CMYK.
- Reduced instruction set computing. A type of microprocessor design that
focuses on rapid and efficient processing of a relatively small set of
instructions. RISC architecture limits the number of instructions that are
built into the microprocessor, but optimizes each so it can be carried out
very rapidly—usually within a single clock cycle.
- Refers to computers based on Windows NT/Windows 2000–compatible
implementations of RISC processors.
- Run-length encoding. A data-compression technique in which successive
bytes of identical data are converted into a 2-byte pair, consisting of the
repeated data byte and the repeat count.