• Join (law), to include additional counts or additional defendants on an indictment
• Join (mathematics), a least upper bound of set orders in lattice theory
• Join (relational algebra), a type of binary operator
• Join (SQL)
  Join (SQL)
  An SQL join clause combines records from two or more tables in a database. It creates a set that can be saved as a table or used as is. A JOIN is a means for combining fields from two tables by using values common to each. ANSI standard SQL specifies four types of JOINs: INNER, OUTER, LEFT, and RIGHT...
  
  , a SQL and relational database operation
• Join (topology)
  Join (topology)
  In topology, a field of mathematics, the join of two topological spaces A and B, often denoted by A\star B, is defined to be the quotient space / R, \,...
  
  , an operation combining two topological spaces
• join (Unix)
  Join (Unix)
  join is a command in Unix-like operating systems that merges the lines of two sorted text files based on the presence of a common field. It is similar to the join operator used in relational databases but operating on text files....
  
  , a Unix command
• Join-calculus
  Join-calculus
  The join-calculus is a process calculus developed at INRIA. The join-calculus was developed to provide a formal basis for the design of distributed programming languages, and therefore intentionally avoids communications constructs found in other process calculi, such as rendezvous communications,...
  
  , a process calculus developed at INRIA for the design of distributed programming languages
• Joins (concurrency library)
  Joins (concurrency library)
  Joins is an asynchronous concurrent computing API from Microsoft Research for the .NET Framework. It is based on join calculus and makes the concurrency constructs of the Cω language available as a .NET assembly that any CLI compliant language can use....
  
  , a concurrent computing API from Microsoft Research
• Join Network Studio of NENU
  Join Network Studio of NENU
  Join Network Studio of Northeast Normal University China is affiliated with of NENU. This is a non-profit organization composed by some undergraduate students. All departments except Software Department of the studio are located at the administration building of the main campus of NENU, and...
  
  , a non-profit organization of Northeast Normal University
• Joins.com, the website for South Korean newspaper JoongAng Ilbo

See also

• Joiner
  Joiner
  A joiner differs from a carpenter in that joiners cut and fit joints in wood that do not use nails. Joiners usually work in a workshop since the formation of various joints generally requires non-portable machinery. A carpenter normally works on site...
  
  , a woodworker who makes and installs architectural woodwork
• Joinery (disambiguation)
• Joint (disambiguation)
  Joint (disambiguation)
  Joint is a location where two bones make contact.Joint may also refer to:- Physics :* Joint , a connection between two rigid bodies which allows movement with one or more degrees of freedom between them...