An acronym is an abbreviation of the first letters of a phrase or the long name of an organization that forms a word or conveys a message. In electronic communication or online documents, acronyms are used as writing shorthand or a method to communicate humor. Below, you will find an alphabetical listing for hundreds of computer related acronyms. 

[A][B][C][D][E][F][G][H][I][J][K][L][M][N][O][P][Q][R][S][T][U][V][W][XYZ]

[U]

UAC - Union Aerospace Corporation
UAC - User Account Control
UARPS - Unisys ARPS
UART - Universal Asynchronous Receiver-Transmitter
UDF - Universal Disc Format
UDMA - Ultra Direct Memory Access
UDP - User Datagram Protocol
UHA - United Hacking Association
UHCI - Universal Host Controller Interface
UHF - Ultra High Frequency
UI - User Interface
UID - User IDentification
VIP - Video Interface Port
UMA - Unified Memory Architecture
UMA - Upper Memory Area
UMB - Upper Memory Blocks
UMC - United Microelectronic Components
UMIST - University of Manchester Institute of Science and Technology
UML - Unified Modeling Language
UNICEF - United Nations International Children's Emergency Fund
UNIVAC - UNIVersal Automatic Computer
UPI - Universal Peripheral Interface
UPS - Uninterruptible Power Supply
UPX - Ultimate Packer for eXecutables
URL - Uniform Resource Locator
USB - Universal Serial Bus
USENET - USEr NETwork
USL - Unix System Laboratories
USN - Update Sequence Numbers
USSD - Unstructured Supplementary Services Data
UTC - Universal Coordinated Time
UTM - Universal Transverse Mercator
UTP - Unshielded Twisted Pair
UUCP - Unix to Unix CoPy
UV - UltraViolet
UVPROM - Ultra Violet Programmable Read Only Memory