Education

• University of California, Davis
  University of California, Davis
  The University of California, Davis is a public teaching and research university established in 1905 and located in Davis, California, USA. Spanning over , the campus is the largest within the University of California system and third largest by enrollment...
  
  
• University College Dublin
  University College Dublin
  University College Dublin ) - formally known as University College Dublin - National University of Ireland, Dublin is the Republic of Ireland's largest, and Ireland's second largest, university, with over 1,300 faculty and 17,000 students...
  
  , Irish university
  • University College Dublin A.F.C.
    University College Dublin A.F.C.
    University College Dublin Association Football Club known commonly as UCD is the football team of University College Dublin. They play in the League of Ireland. The club, founded in 1895 was elected to the league in 1979 under the management of Dr. Tony O'Neill. Since the 2008 season they have...
    
    , the university's association football club
  • University College Dublin RFC, the university's rugby union
    Rugby union
    Rugby union, often simply referred to as rugby, is a full contact team sport which originated in England in the early 19th century. One of the two codes of rugby football, it is based on running with the ball in hand...
    
     club
  • UCD GAA
    UCD GAA
    UCD GAA or University College Dublin Gaelic Athletic Association club is a Dublin based Gaelic games club in University College Dublin. The UCD hurling club was founded in 1900 and boasted the motto's "Ad Astra" and "Cothrom Féinne". The first team was an amalgamation of students from UCD and...
    
    , the university Gaelic games
    Gaelic games
    Gaelic games are sports played in Ireland under the auspices of the Gaelic Athletic Association. The two main games are Gaelic football and hurling...
    
     club
• University College, Durham
  University College, Durham
  University College, commonly known as Castle, is a college of the University of Durham in England. Centred around Durham Castle on Palace Green, it was founded in 1832 and is the oldest of Durham's colleges. As with all of Durham's colleges, it is, independently of the University, a listed body...
  
  , a college of the University of Durham
• University of Colorado Denver
  University of Colorado Denver
  The University of Colorado Denver, shortened as CU Denver, UC Denver, or UCD, is a public university in the United States state of Colorado. It is one of three schools of the University of Colorado system. The university has two campuses — one in downtown Denver at the Auraria Campus, and the other...
  
  

Science and Technology

• User-centered design
  User-centered design
  In broad terms, user-centered design or pervasive usability is a design philosophy and a process in which the needs, wants, and limitations of end users of a product are given extensive attention at each stage of the design process...
  
  
• Uniform Call Distribution
• Unicode Character Database
• Urine collection device
  Urine collection device
  A urine collection device or UCD is a device that allows the collection of urine for analysis or for purposes of simple elimination...
  
  , a deviation used to collect urine, especially in aircraft and spacecraft
• Universal Common Descent
• Urea Cycle Disorder
  Urea cycle disorder
  An urea cycle disorder or urea cycle defect is a genetic disorder caused by a deficiency of one of the enzymes in the urea cycle which is responsible for removing ammonia from the blood stream. The urea cycle involves a series of biochemical steps in which nitrogen, a waste product of protein...
  
  
• User contributed data, information supplied to a web site by a user
• Ultra compact dwarf, a type of dwarf galaxy
  Dwarf galaxy
  A dwarf galaxy is a small galaxy composed of up to several billion stars, a small number compared to our own Milky Way's 200-400 billion stars...
  
  

Other

• Unión Cívica Democrática
  Unión Cívica Democrática
  Unión Cívica Democrática is a network of forty Honduran activist organizations, which took an active part during the 2009 Honduran constitutional crisis, promoting several demonstrations against the former ousted president Manuel Zelaya...
  
  
• Universal Children's Day
• Union of the Democratic Centre (disambiguation), party name in various countries
• The Universal Child Database
  Universal Child Database
  ContactPoint was a government database that held information on all children under 18 in England. It was created in response to the abuse and death of eight-year-old Victoria Climbié in 2000 in England; in which it was found that various agencies involved in her care had failed to prevent her death...
  
  , a government database in the United Kingdom.
• Union of the Democratic Centre (Spain)