VeriFone Omni 3200 Reference Manual page 183

Appendix C. Glossary
Remote Host Computer. A host computer that is connected to a
terminal over a dial-up telephone line. The opposite of 'remote' is
'local'.
Request to Send. One of the data set interchange messages
defined in the EIA Standard RS-232. A request for information to be
sent over a link from one communicating entity to another.
RS-232. Also 'RS232C'. A widely used standard interface that
covers the electrical connection between data communication
equipment, such as a modem, and data terminal equipment, such as a
microcomputer or computer terminal. The RS232C interface standard
was developed by the EIA (Electronic Industries Association) and is
essentially equivalent to the CCITT's V.24 interface.
Scroll. To move all or part of the information displayed on a screen
up or down, left or right, to allow new information to appear. For the
Omni 3200, text that does not fit entirely within the 21-character wide
display area can be scrolled to the left or right using the [#] and [*]
keys.
SDLC. Abbreviation for 'synchronous data link control'. A data link
control protocol developed and used by IBM, and based on the use of
frames to delimit message boundaries.
Search Key. Also called 'key'. In the Omni 3200, a short character
string that is used by an application to identify a keyed file record
stored in the terminal's CONFIG.SYS file. For example, *ZA or *OT.
A keyed file record consist of two parts: a search key that identifies
the record, and the value or data stored in the record. See also 'Keyed
File Record' and 'CONFIG.SYS File'.
Serial Port. A connection point through which digital information is
transferred one digital bit at a time. Same as 'serial interface'. The
Omni 3200 has two serial ports, labeled "RS232" and "Bar Code/PIN
Pad." The main serial ports on a download or host computer are
usually assigned the device IDs, COM1 and COM2.
SRAM. See 'RAM'.
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