Telxon PTC-921 DOS, User Manual

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mA
Milliampere hour(s). A measurement of the ability to
provide electrical power.
MS-DOS
Microsoft Disk Operating System.
one-way
communication
Transport of information from one device to another
without interruption. In one-way communication,
the receiving device cannot respond directly to the
sending device.
PTC
Portable Tele-Transaction Computer. A battery-
powered, programmable device used to collect, store,
and transmit data.
RAM
Random access memory. In a PTC, RAM chips store
program files and data entered by the operator.
RF
Radio frequency.
ROM
Read-only memory. In a PTC, ROM chips contain the
operating system and the application program.
RS-232
An Electronic Industries Association (EIA) standard
that defines the connector, connector pins, and signals
used to transfer data serially from one device to
another.
RTS
Request-to-send signal. RTS initiates the data
transmission sequence on a communication line
between a modem and a terminal device.
RXD
Receive data signal. RXD indicates that a device is
currently receiving data.
signals
Electronic impulses that transmit data from one
device to another.
software
A stored program or set of programs that is loaded
into RAM for execution. Contrast with
hardware .
two-way
communication
Exchange of information between two devices. After
each block of data, the receiving device sends a
positive or negative acknowledgment to the sending
device.
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