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U
U. S. Controlled Facility
U. S. -Controlled Facility
U. S. Controlled Space
U. S. -Controlled Space
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U. S. Person
UA
UBD
UDP datagram
UDP port scanning
UID (User ID)
UIRK
UIS
UK
Umask
UN*X
Unapproved Software
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Unavailability
Unbundling
Uncertainty Calculus
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Under The Hood
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Undesired Signal Data Emanations
Undocumented Feature
UNICODE directory traversal attack
Uniform Encoding
Uniformed security personnel
Uninteresting
Unit Element
Unit Interval
UNIX
UNIX Brain Damage
UNIX Conspiracy
UNIX Weenie
UNIX:
Unixism
Unnecessary services
Unnumbered Command
Unnumbered Response
Unprivileged User
Unprotect
Unprotected
Unreliable
Unsuccessful Call
Unswizzle
Untrusted Applications
Untrusted Element
Untrusted network
Untrusted Process
Unwind The Stack
Unwind-Protect
Up
Up-Converter
Update
Updating
Upgrade
Upgrade Parameter
Uplink
Upload
UPP
Upthread
Uptime
Urchin
URL
URL filtering
Usable Line Length
Usage
Use policy
Useful Line
Usenet
User
User Datagram Protocol (UDP)
User ID
User ID (UID)
User Identification
User Information
User Information Bit
User Information Block
User Partnership Program
User Profile
User/process Interface
User-Obsequious
USG UNIX
Utility Program
Utility Routine
UTSL
UUCPNET
UV
UTSL
  • // n. [UNIX] On-line acronym for `Use the Source, Luke' (a pun on Obi-Wan Kenobi's "Use the Force, Luke!" in "Star Wars") -- analogous to RTFS (sense 1), but more polite. This is a common way of suggesting that someone would be better off reading the source code that supports whatever feature is causing confusion, rather than making yet another futile pass through the manuals, or broadcasting questions on Usenet that haven't attracted wizards to answer them. Once upon a time in elder days, everyone running UNIX had source. After 1978, AT&T's policy tightened up, so this objurgation was in theory appropriately directed only at associates of some outfit with a UNIX source license. In practice, bootlegs of UNIX source code (made precisely for reference purposes) were so ubiquitous that one could utter it at almost anyone on the network without concern. Nowadays, free UNIX clones are becoming common enough that almost anyone can read source legally. The most widely distributed is probably Linux, with variants of the NET/2 and 4. 4BSD distributions running second. Cheap commercial UNIXes with source such as BSD/386 are accelerating this trend.