Glossary
application
A PTC program that is designed to perform a specific
task for the user. Examples include route accounting,
payroll, price lookup, shipping, and inventory control.
bar code
A series of vertical bars and spaces used to encode
numeric or alphanumeric information. Bar codes are
designed to be read by electronic means such as
bar-code readers or laser scanners.
byte
A group of eight bits that acts as a basic unit for
information transfer and storage.
CD
Carrier detect signal. CD indicates that the modem is
receiving a signal from the remote modem.
character
A letter, number, or symbol.
CTS
Clear-to-send signal. CTS indicates that the line
between a modem and a terminal device is clear for
transmission. CTS typically follows a raised
request-to-send (RTS) signal.
data
communication
The transport of encoded information from one point
to another.
DCE
Data communications equipment. A device that
controls and converts incoming data or
communication. For example, a modem.
display
The screen on the front of the PTC. It is used to show
data entered into the PTC and warning prompts.
DSR
Data set ready signal. The modem sends DSR to the
attached device to indicate that the modem is
connected, on, and ready.
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