Specifications

Glossary
AIM Automatic Identification Manufacturers, Inc. is the trade
association for manufacturers of automatic identification
systems.
Alphanumeric A character set that contains letters, numbers and other
characters such as special symbols.
Aperture The opening in an optical system defined by a lens or baffle
that establishes the field of view.
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.
Aspect Ratio The ratio of symbol height to symbol length in a 2-
dimensional symbol.
Authentication Security measure designed to establish the validity of a
transmission, message, or originator, or a means of
verifying an individual's authorization to receive specific
categories of information.