U

• u-
• UBD
• UBE
• ubergeek
• UCE
• UDP
• UN*X
• undefined external reference
• under the hood
• undocumented feature
• uninteresting
• Unix
• Unix brain damage
• Unix conspiracy
• Unix weenie
• unixism
• unswizzle
• unwind the stack
• unwind-protect
• up
• upload
• upstream
• upthread
• uptime
• urchin
• URL
• Usenet
• Usenet Death Penalty
• user
• user-friendly
• user-obsequious
• userland
• Utah teapot, the
• UTSL
• UUOC