• Unmanned Aircraft
• Universal Audio Inc
  Universal Audio (company)
  Universal Audio is a designer and manufacturer of audio signal processing hardware and software founded in 1958. The current incarnation of the company was re-established in 1999 by brothers Jim Putnam and Bill Putnam, Jr., sons of the original founder Bill Putnam...
  
  , a designer and manufacturer of audio signal processing hardware and software.
• German submarine U-A, a German submarine of the Second World War
• The Umbrella Academy
  The Umbrella Academy
  The Umbrella Academy is a comic book written by Gerard Way with art by Gabriel Bá, cover art by James Jean, colors by Dave Stewart and letters by Blambot's Nate Piekos. The six-issue limited series was released by Dark Horse Comics, the first issue making its premiere on September 19, 2007. It won...
  
  , a graphic novel by Gerard Way
  Gerard Way
  Gerard Arthur Way is an American musician and comic book writer who has served as lead vocalist and co-founder of the band My Chemical Romance since its formation in 2001...
  
  
• Unauthorized Absence
• Unitary authority
  Unitary authority
  A unitary authority is a type of local authority that has a single tier and is responsible for all local government functions within its area or performs additional functions which elsewhere in the relevant country are usually performed by national government or a higher level of sub-national...
  
  , local government division in England
• Urbanized Area
• Future Force Unit of Action
  Future Force Unit of action
  The Future Force Unit of Action will be the United States Army’s tactical warfighting echelon. Although optimized for offensive operations, the Future Combat Systems equipped Unit of Action will have the ability to execute a full spectrum of operations...
  
  , proposed US Army tactical unit

Units of measure

• astronomical unit
  Astronomical unit
  An astronomical unit is a unit of length equal to about or approximately the mean Earth–Sun distance....
  
   (ua or u.a. - also AU, au, a.u.)
• microampere (uA, properly µA)
• Unit of account
  Unit of account
  A unit of account is a standard monetary unit of measurement of value/cost of goods, services, or assets. It is one of three well-known functions of money. It lends meaning to profits, losses, liability, or assets....
  
  

Gaming

• Unearthed Arcana
  Unearthed Arcana
  Unearthed Arcana is the title shared by two hardback books published for different editions of the Dungeons & Dragons fantasy role-playing game...
  
  , Dungeons & Dragons sourcebook
• Unknown Armies
  Unknown Armies
  Unknown Armies is an occult-themed role playing game by John Tynes and Greg Stolze and published by Atlas Games. Subtitled "A roleplaying game of power and consequences"...
  
  , role-play game

Organizations

• Under Armour
  Under Armour
  Under Armour is an American sports clothing and accessories company. The company is a supplier of a wide range of sportswear and casual apparel mainly focusing on hi-tech sportswear for professional athletes...
  
  , a clothing brand
• ultrAslan
  Ultraslan
  ultrAslan is an ultras group who support Turkish football club Galatasaray. They were named as "ultrAslan" in 2001 but their history goes way back. They have branches both in Turkey and abroad...
  
  , Galatasaray SK fan group
• Union Association
  Union Association
  The Union Association was a league in Major League Baseball which lasted for only one season in 1884. St. Louis won the pennant and joined the National League the following season...
  
  , baseball league
• United Airlines
  United Airlines
  United Air Lines, Inc., is the world's largest airline with 86,852 employees United Air Lines, Inc., is the world's largest airline with 86,852 employees United Air Lines, Inc., is the world's largest airline with 86,852 employees (which includes the entire holding company United Continental...
  
  , IATA airline designator
• United Artists
  United Artists
  United Artists Corporation is an American film studio. The original studio of that name was founded in 1919 by D. W. Griffith, Charles Chaplin, Mary Pickford and Douglas Fairbanks....
  
  , film studio
• United Association
  United Association
  The United Association of Journeymen and Apprentices of the Plumbing, Pipefitting and Sprinkler Fitting Industry of the United States and Canada, commonly known as the United Association is a trade union of journeymen and apprentices of the plumbing, pipefitting, and sprinkler fitting industry of...
  
  , trade union
• UP Aerospace
  UP Aerospace
  UP Aerospace, Inc. is a private spaceflight corporation based out of Denver, Colorado. UP Aerospace provides ultra-low cost space access and payload transportation for corporate, military and educational payloads, via their SpaceLoft XL Sounding rocket launch vehicles.- History and Future Plans...
  
  

Schools

• University of Alabama
  University of Alabama
  The University of Alabama is a public coeducational university located in Tuscaloosa, Alabama, United States....
  
  
• University of Alaska
• University of Arizona
  University of Arizona
  The University of Arizona is a land-grant and space-grant public institution of higher education and research located in Tucson, Arizona, United States. The University of Arizona was the first university in the state of Arizona, founded in 1885...
  
  
• University of Arkansas
  University of Arkansas
  The University of Arkansas is a public, co-educational, land-grant, space-grant, research university. It is classified by the Carnegie Foundation as a research university with very high research activity. It is the flagship campus of the University of Arkansas System and is located in...
  
  
• Ursuline Academy (disambiguation)
• one of several schools that can be abbreviated U of A (disambiguation)

Technology

• Universal Alcatel
  Universal Alcatel
  Universal Alcatel is a protocol that makes it possible to manage the identity of station owners in an Alcatel-Lucent PBX. The UA interface represents a termination for 1 twisted pair which gives access to four numerical channels in 64kb/s full duplex....
  
  , a telecommunications protocol
• User agent
  User agent
  In computing, a user agent is a client application implementing a network protocol used in communications within a client–server distributed computing system...
  
  , computer networking software class
• User Assistance
  User Assistance
  User assistance is a general term for guided assistance to a user of a software product. The phrase incorporates all forms of help available to a user. Assistance can also automatically perform procedures or step users through the procedure, depending on the question that the user asked...
  
  , computer programme manuals and documentation

See also

• U of A (disambiguation), things that can be abbreviated "U of A"