Glossary
fL.
Prefix micro;
0.000001.
fLS.
Microsecond; 0.000 001 second.
A.
Ampere.
ac. Alternating current.
accumulator. A register in which the result of an operation
is
formed.
active high. Designates a signal
that
has to
go
high to produce an
effect. Synonymous with positive true.
active
low.
Designates a signal
that
has to go low to produce an
~
effect. Synonymous with negative true.
adapter.
An
auxiliary device
or
unit used
to
extend the operation
of another system.
address bus. One
or
more conductors used to carry the
binary-coded address from the processor throughout the rest of
the system.
algorithm. A finite set of well-defined rules for the solution of a
problem in a finite number of steps.
aU
points addressable (APA). A mode in which all points of a
displayable image can be controlled by the user.
alphameric. Synonym for alphanumeric.
alphanumeric (A/N). Pertaining
to
a character set that contains
letters, digits,
and
usually
other
characters, such as punctuation
marks. Synonymous with alphameric.
Glossary-l
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