40. Hertz (Hz.): A unit
of
frequency equal
to
one cycle per second.
41. High order position:
The
leftmost position in a string
of
characters.
42. Input/Output (I/O): 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. (2) Pertaining to a device whose parts
can
be
performing an input process and an output process
at
the same
time.
43. Integrated Circuit: A combination
of
interconnected circuit
elements inseperably associated
on
or within a continuous
substrate.
44. Interpreter: A computer program used to interpret. Synony-
mous with interpretive program.
45. Interrupt:
(1) A suspension
of
a process, such as the execution
of
a computer program, in such a way that the process
can
be
resumed. (2)
To
stop a process in such a way
that
it can be
resumed. (3)
In
data
transrnission, to take an action
at
a
receiving station
that
causes the transmitting station to termin-
ate a transmission.
46.
I/O
Channel: Input/Output Channel. In a data processing
system, a functional unit, controlled by the processing unit, that
handles the transfer
of
data between main storage and peri-
pheral equipment.
47.
I/OCH
CK:
I/O
Channel Check. (Refer to System Board
I/O
Channel Descriptions).
48.
I/O
CH
ROY:
I/O
Channel Ready. (Refer to System Board
I/O
Channel Descriptions).
49. IMR: Interruption Mask Register.
50. lOR:
I/O
Read Command. (Refer to System Board
I/O
Channel Descriptions).
51.
lOW:
I/O
Write Command: (Refer
to
System Board
I/O
Channel Descriptions).
52. IRQ2-IRQ7: Interrupt Request 2 to 7. (Refer to System Board
I/O
Channel Descriptions).
53. K:
An abbreviation for the prefix kilo, i.e. 1000 in decimal
notation.
To
the tenth power, 1024 in decimal notation.
54. KB: Kilobyte.
55. Khz: Kilohertz. A unit
of
frequency equal to 1,000 hertz.
G-4
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