National Instruments PCI-1428 User Manual
Page 32
Glossary
G-4
ni.com
ft
Feet.
H
h
Hour.
Hz
Hertz. Frequency in units of 1/second.
I
I/O
Input/output. The transfer of data to/from a computer system involving
communications channels, operator interface devices, and/or data
acquisition and control interfaces.
IC
Integrated circuit.
IEEE
Institute of Electrical and Electronics Engineers.
in.
Inches.
instrument driver
A set of high-level software functions, such as NI-IMAQ, that control
specific plug-in computer boards. Instrument drivers are available in
several forms, ranging from a function callable from a programming
language to a virtual instrument (VI) in LabVIEW.
interrupt
A computer signal indicating that the CPU should suspend its current task
to service a designated activity.
interrupt level
The relative priority at which a device can interrupt.
IRQ
Interrupt request. See interrupt.
K
k
Kilo. The standard metric prefix for 1,000, or 10
3
, used with units of
measure such as volts, hertz, and meters.
K
Kilo. The prefix for 1,024, or 2
10
, used with B in quantifying data or
computer memory.
kbytes/s
A unit for data transfer that means 1,000 or 10
3
bytes/s.
Kword
1,024 words of memory.