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Appendix A • Glossary
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programs for industrial PCs as well as programmable logic controllers (e.g. the software in a
washing machine controller). This software is written in read-only memory (ROM, PROM,
EPROM) and cannot be easily replaced.
Floppy
Also known as a diskette. A round plastic disk with an iron oxide coating that can store a
magnetic field. When the floppy disk is inserted in a disk drive, it rotates so that the different
areas (or sectors) of the disk's surface are moved under the read/write head. This allows the
magnetic orientation of the particle to be modified and recorded. Orientation in one direction
represents binary 1, while the reverse orientation represents binary 0.
FPC
An abbreviation for " F lat P anel C ontroller".
FPD
An abbreviation for " F lat P anel D isplay".
FTP
" F ile T ransfer P rotocol". Rules for transferring data over a network from one computer to another
computer. This protocol is based on TCP/IP, which has established itself as the standard for
transferring data over Ethernet networks. FTP is one of the most used protocols on the Internet.
It is defined in RFC 959 in the official regulations for Internet communication.
GB
Gigabyte (1 GB = 230 or 1,073,741,824 Bytes)
Handshake
Method of synchronization for data transfer when data is sent at irregular intervals. The sender
signals that data can be sent, and the receiver signals when new data can be received.
IDE
An abbreviation for " I ntegrated D rive E lectronics". A drive interface where the controller
electronics are integrated in the drive.
Interface
From the hardware point of view, an interface is the connection point between two
modules/devices/systems. The units on both sides of the interface are connected by the
interface lines so that data, addresses, and control signals can be exchanged. The term interface
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