Siemens SIMATIC Field PG P4 Manual page 129

BIOS
Acronym for Basic Input/Output System. On PC-compatible computers, the set of
essential software routines that tests hardware at startup, starts the operating
system, and supports the transfer of data among hardware devices.
Boot Diskette
Boot disk that contains a boot sector and an initial loader for the operating system.
Boot
Start or restart of the PG. During the boot sequence the operating system is
transferred from the system drive into the main memory.
Booting
Loading operation which transfers the operating system to the main memory.
Bps
The speed (in bits per second) with which information is transmitted over a data
link.
C
Cache
The cache memory buffers often used data to increase the speed of access. The
computer has two cache levels.
Cardbus interface
This interface is compatible with 32-bit Cardbus Cards with PCI performance
compliant with the PC Card standard.
CD ROM
Compact Disc Read Only Memory. Removable memory for large amounts of data.
Click
Pressing and immediately releasing the left mouse button; selects objects or
triggers commands.
COM2 Port
Serial RS-232 interface which can be used to connect a mouse or a printer.
SIMATIC Field PG P4 Manual
A5E00180080-04
Glossary
Glossary-3