housekeeping. Operations
or
routines
that
do
not
contribute
directly
to
the
solution
of
the problem
but
do
contribute directly
to
the
operation
of
the
computer.
Hz.
Hertz
image. A fully processed unit
of
operational
data
that
is ready
to
be
transmitted to a remote unit;
when
loaded into control storage
in the
remote
unit, the image determines the operations
of
the
unit.
immediate instruction.
An
instruction
that
contains within itself
an
operand
for the operation specified,
rather
than
an
address
of
the
operand.
index register. A register whose contents may
be
used
to
modify
an
operand
address during the execution
of
computer
instructions.
indicator.
(1)
A device
that
may
be
set into a prescribed state,
usually according to the result
of
a previous process
or
on
the
occurrence
of
a specified condition in the equipment,
and
that
usually gives a visual
or
other
indication
of
the
existence
of
the
prescribed state,
and
that
may in some cases
be
used to determine
the
selection among alternative processes; for example,
an
overflow indicator. (2)
An
item
of
data
that
may
be
interrogated
to determine
whether
a particular condition has
been
satisfied in
the
execution
of
a
computer
program; for example, a switch
indicator,
an
overflow indicator.
inhibited. (1) Pertaining
to
a state
of
a processing unit in which
certain types
of
interruptions are
not
allowed
to
occur.
(2) Pertaining to
the
state in which a transmission control unit
or
an
audio response unit
cannot
accept incoming calls
on
a line.
initialize.
To
set counters, switches, addresses,
or
contents
of
storage
to
0
or
other
starting values
at
the beginning of,
or
at
prescribed points in, the operation
of
a
computer
routine.
input/output
(I/O).
(1) Pertaining to a device
or
to a channel
that
may
be
involved in
an
input process, and,
at
a different time,
in
an
output
process.
In
the English language,
"input/output"
may
be
used
in
place
of
such terms as
"input/output
data,"
"input/
output
signal,"
and
"input/output
terminals,"
when
such
usage is clear in a given context. (2) Pertaining
to
a device
Glossary-I7
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