Field replaceable unit (FRU)
An assembly that is replaced in its entirety when any one of its components fails.
File
A named set of records that are stored or processed as a unit. Also referred to as a data set.
File protection
The processes and procedures that are established in an information system that are designed to
inhibit unauthorized access to, contamination of, or deletion of a le.
File transfer protocol (FTP)
In the Internet suite of protocols, an application layer protocol that uses TCP and Telnet services to
transfer bulk-data les between machines or hosts.
Firmware
Proprietary code that is delivered as microcode as part of an operating system. Firmware is more
efcient than software loaded from an alterable medium and more adaptable to change than pure
hardware circuitry. An example of rmware is the Basic input/output system (BIOS) in read-only
memory (ROM) on a PC system board.
FLASH EEPROM
An electrically erasable programmable read-only memory (EEPROM) that can be updated.
FMR
Field microcode replacement.
Format
The arrangement or layout of data on a data medium.
Formatter
Part of a magnetic tape subsystem that runs data conversion, speed matching, encoding, rst-level
error recovery, and interfaces to one or more tape drives.
FP
File protect.
Frayed
Damaged as if by an abrasive substance.
FRU
Field replaceable unit.
FSC
Fault symptom code.
FSI
Fault symptom index.
FTSS
Field Technical Sales Support.
Functional microcode
Microcode that is resident in the machine during normal customer operation.
G
g
Gram.
GB
gigabyte.
GBIC
Gigabit Interface Converter.
Gb/s
gigabits/second
Gbit
gigabit
Glossary
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