Siemens SIMATIC Box PC 620 Manual page 195

Interrupt
The interruption of program processing in the processor of a programmable
controller by an interrupt event.
IRQ
Interrupt Request
ISA
Industrial Standard Architecture (bus for expansion module)
J
JEIDA
(Japanese Electronics Industry Development Association) Association of Japanese
electronics manufacturers whose aim is to set up standards worldwide for the
miniaturization and flexible application of PC expansion cards. Cooperates with
PCMCIA.
K
Keyboard
The keyboard is the collection of keys which are used to input data, text,
characters, letters, numbers, special characters and control commands in a
computer. The keyboard forms the input interface between the user and the
computer.
I
LCD
Liquid Crystal Display
LED
Light-emitting diode (for display and indicating purposes).
LPT1 Port
The LPT1 port (Centronics port) is a parallel interface that can be used to connect
a printer.
SIMATIC Box PC 620 Manual
C79000-G7076-C639-04
Glossary
Glossary-7