** Tuple relational calculus ( TRC )

** Projection ( relational algebra )

** Join ( relational algebra ), a type of binary operator

** A marine standard, relational list of geographic names, coupled with information and maps of the geographic location of these features.

** Distributed databases and distributed database management systems.

** oral interviews from the La Guardia and Wagner Archives / Fiorello H. La Guardia Oral History database

** Record ( database ), a set of fields in a database related to one entity

** Network transparency if there is no difference between the centralized database and the distributed database

** UI data binding, linking a user interface element to an element of a domain model, such as a database field

** Domain name registry, a database of all domain names registered in a top-level domain

** Backup Domain Controller, a Windows NT 4 server that has a backup copy of the user accounts database

** Primary Domain Controller, a pre-Windows 2000 NT server with the master copy of the user accounts database

** database services

** Lov Grover, at Bell Labs, invented the quantum database search algorithm.

** SQL injection, a security violation technique using database commands

** Temporal database, a database recording aspects of time varying values

** back-mdb: a transactional backend built on OpenLDAP's MDB memory-mapped database

** accesslog: log server activity in another LDAP database, for LDAP-accessible logging

** the GEOnet Names Server ( GNS ) provides access to the National Geospatial-Intelligence Agency's ( NGA ) and the U. S. Board on Geographic Names ' ( US BGN ) database of foreign geographic feature names.

** Data mining closely related to database

** Seattle Photographs Ongoing database of over 1, 700 historical photographs of Seattle with special emphasis on images depicting neighborhoods, recreational activities including baseball, the Great Seattle Fire of 1889, " The Great Snow of 1916 ", theaters and transportation.

** Seattle Photographs Ongoing database of over 1, 700 historical photographs of Seattle with special emphasis on images depicting neighborhoods, recreational activities including baseball, the Great Seattle Fire of 1889, " The Great Snow of 1916 ", theaters and transportation.

** Seattle Photographs Ongoing database of over 1, 700 historical photographs of Seattle with special emphasis on images depicting neighborhoods, recreational activities including baseball, the Great Seattle Fire of 1889, " The Great Snow of 1916 ", theaters and transportation.

** Personal database

** For information on obtaining the Wikipedia database, see Wikipedia: Database download.

** In order theory, see order automorphism.

** Microevolution: species — speciation — adaptation — selection — natural selection — directional selection — sexual selection — genetic drift — sexual reproduction — asexual reproduction — colony — allele frequency — neutral theory of molecular evolution — population genetics — Hardy-Weinberg principle

** Quantum chromodynamics, a theory of the strong interaction ( color force )

** Dual ( category theory ), a formalization of mathematical duality

** LTI system theory

** electron theory of metals

** Backward induction in game theory and economics

** for his profound contributions to three major areas of operations research and management science: inventory theory, dynamic programming and lattice programming.

** in recognition of his fundamental contributions to game theory and related areas

** for his contributions to queueing theory, applied probability and stochastic modelling

** Limit ( category theory )

** Most forms of cognitivism hold that some such propositions are true, as opposed to error theory, which asserts that all are erroneous.

** Error theory, another form of moral anti-realism, holds that although ethical claims do express propositions, all such propositions are false.

** In topos theory, the ( codomain of the ) subobject classifier of an elementary topos.

** In group theory, the omega and agemo subgroups of a p-group, Ω ( G ) and ℧( G )

** In number theory, Ω ( n ) is the number of prime divisors of n.

** In set theory, the first uncountable ordinal number ( more commonly written as ω < sub > 1 </ sub >)

** In number theory, ω ( n ) is the number of distinct prime divisors of n.

** In number theory, an arithmetic function

** the ultraproduct, in model theory.

** General relativity, Albert Einstein's theory of gravitation

** Special relativity, a theory formulated by Albert Einstein, Henri Poincaré, and Hendrik Lorentz

** Constructionism ( learning theory )

** Coherence theory of truth