Specifications

GLOSSARY
146 REFERENCE MANUAL
Track 1, 2, or 3 data Information stored on tracks
1, 2, or 3 of a debit or credit card magnetic stripe,
which can be read by a magnetic card reader device,
such as the one that is integrated in the Omni 37xx
terminal.
Transaction An exchange of data resulting in a
transfer of goods, services, value, and/or information
between two parties.
Variable A string of characters that denotes some
value stored within the computer and that can be
changed during execution. A variable may be inter-
nal to a program, in which case it is held in memory,
or external if the program must perform an input op-
eration to read its value. See Parameter.
Volatile memory A type of memory where the
contents are destroyed if the power supply to the
memory is interrupted. When volatile memory, such
as SRAM, is used for crucial applications, it is often
back up by battery-supplied power. Compare with
Non-volatile memory.