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achieve a desired result. See also application.
prompt: A message the computer provides indicating it is ready for or requires
information or an action from you.
protected mode: A microprocessor mode introduced with the Intel 80286
processor. This mode supports up to four gigabytes of address space and vides
support for multitasking and other advanced features.
protocol: A set of rules that allows devices to exchange information without
affecting its contents.
pulse dialing: A type of dialing that uses rotary pulses to generate the
telephone number.
R
RAMDRIVE: Part of the computerÕs random access memory assigned to simulate a
disk. RAMDRIVE is a feature of MS-DOS.
Random Access Memory (RAM): High speed memory within the computer circuitry
that can be read or written to.
RD: Receive Data. An RS-232-C signal used in the exchange of data between the
computer and a serial printer or modem.
Radio frequency interference (RFI) shield: A metal shield enclosing the printed
circuit boards of the printer or computer to prevent radio and TV interference.
All computer equipment generates radio frequency signals. The FCC regulates the
amount of signals a computing device can allow past its shielding. A Class A
device is sufficient for office use. Class B provides a more stringent
classification for home equipment use. Toshiba portable computers comply with
Class B computing device regulations.
real mode: A microprocessor mode that supports up to 1MB of memory and can
only run one program at a time.
restart: Resetting a computer without turning it off (also called Õwarm bootÕ
or Õsoft resetÕ). To restart the computer, press Ctrl + Alt+ Del while the
computer is on. See also boot.
RGB: Red, green, and blue. A device that uses three input signals, each
activating an electron gun for a primary additive color (red, green, and blue)
or port for using such a device. See also CRT.
RJ11: A modular telephone jack.
ROM: Read Only Memory: A non-volatile memory chip manufactured to contain
information that controls the computerÕs basic operation. You cannot access or
change information stored in ROM.
RS-232-C: The Electronic Industries Association (EIA) interface standard that
describes the 25-pin connector interface and control, data, and status signals
that allow asynchronous communications between computers, printers,
communications and other peripheral devices.