Concurrency

Concurrent means happening at the same time. Concurrency, concurrent, or concurrence may refer to:

Law

 * Concurrence, in jurisprudence, the need to prove both actus reus and mens rea
 * Concurring opinion (also called a "concurrence"), a legal opinion which supports the conclusion, though not always the reasoning, of the majority.
 * Concurrent estate, a concept in property law
 * Concurrent resolution, a legislative measure passed by both chambers of the United States Congress
 * Concurrent sentences, in criminal law, periods of imprisonment that are served simultaneously

Computing

 * Concurrency (computer science), the property of program, algorithm, or problem decomposition into order-independent or partially-ordered units
 * Concurrent computing, the overlapping execution of multiple interacting computational tasks
 * Concurrence (quantum computing), a measure used in quantum information theory
 * Concurrent Computer Corporation, an American computer systems manufacturer
 * Concurrent DOS, Digital Research's multiuser multitasking operating system, with "Concurrent" once being their registered trademark
 * Concurrence, a presentation program designed by Lighthouse Design for NeXTSTEP which inspired Keynote by Apple

Engineering

 * Concurrent engineering, an engineering methodology emphasizing the parallelisation of tasks
 * Concurrent Design Facility, an assessment center of the European Space Agency using concurrent engineering methods

Other

 * Concurrent lines, in geometry, multiple lines or curves intersecting at a single point
 * Concurrency (road), an instance of one physical road bearing two or more different route numbers
 * Concurrent (Easter), the weekday of 24 March Julian used to calculate Julian Easter
 * Concurrent enrolment, a process in the US allowing students to enroll at a university or college while still in high school