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Glossary
© National Instruments Corporation
G-5
E
Ethernet
Standard connection type for networks, where computers are connected by 
coaxial or twisted-pair cable.
event
Object-generated response to some action or change in state, such as a 
mouse click or a completed acquisition. The event calls an event procedure 
that processes the event.
executable
Program file with a 
.exe
 extension that you can run independently of the 
development environment in which it was created.
F
form
Window or area on the screen on which you place controls and indicators 
to create the user interface for your program.
front panel
Interactive user interface of a virtual instrument. Modeled after the front 
panel of physical instruments, it is composed of switches, slides, meters, 
graphs, charts, gauges, LEDs, and other controls and indicators.
FTP
File Transfer Protocol. Protocol based on TCP/IP to exchange files between 
computers.
G
gauge
A control used to input or display numerical data.
GPIB
General Purpose Interface Bus. The standard bus used for controlling 
electronic instruments with a computer. Also called IEEE 488 bus because 
it is defined by ANSI/IEEE Standards 488-1978, 488.1-1987, and 
488.2-1987.
graph
A 2D or 3D display of one or more plots.
H
HTTP
HyperText Transfer Protocol. Protocol based on TCP/IP, which is used to 
download Web pages from an HTTP server to a Web browser.