Siemens SIMATIC Box PC 840 Manual page 190

Glossary
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).
LPT Port
The LPT port (Centronics port) is a parallel interface that can be used to connect a
printer.
LS 120 drive
The LS 120 drive is compatible with previous 3.5"-disk drives. With the LS 120
drive, normal floppy disks (1.44Mbyte) as well as Superdisks with up to 120 Mbyte
capacity can be used.
M
Main Memory
The main memory is the complete RAM memory of a PG or PC.
Memory Card
Memory cards are memory for user programs and parameters in credit-card for-
mat, for example, for programmable modules and CPs.
Micro Memory Card (MMC)
Very compact card for SIMATIC.
Glossary-8
SIMATIC Box PC 840 Manual
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