Glossary
API An interface by means of which one software component
communicates with or controls another. Usually used to refer to
services provided by one software component to another, usually
via software interrupts or function calls
Aperture The opening in an optical system defined by a lens or baffle that
establishes the field of view.
Application Programming Interface See API.
ANSI Terminal A display terminal that follows commands in the ANSI standard
terminal language. For example, it uses escape sequences to
control the cursor, clear the screen and set colors. Communications
programs support the ANSI terminal mode and often default to this
terminal emulation for dial-up connections to online services.
ASCII American Standard Code for Information Interchange. A 7 bit-plus-
parity code representing 128 letters, numerals, punctuation marks
and control characters. It is a standard data transmission code in
the U.S.
Autodiscrimination The ability of an interface controller to determine the code type of
a scanned bar code. After this determination is made, the
information content is decoded.
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