Mapper may refer to:
Computers MAPPER, a Fourth-generation programming language originally sold by Sperry Corporation (now Unisys) Mapper(2), a biological database
-OR- DataMapper, a software library written in the Ruby language Device mapper, handler for Linux Data mapper pattern, a software engineering architectural term Global Mapper, a Global Information System software package developed by Blue Marble Geographics that runs on Microsoft Windows Memory management controller, a chip that handles bank switching on certain NES cartridges, or the part of an emulator that emulates a Memory Management Controller Object–relational mapping, a computer science programming technique Port mapper, maps program to web address Semantic mapper, maps between namespaces Mapper, a variant (or perhaps a generalization?) of Reeb graphs and merge trees used for visualization in topological data analysis
Other Level designer, a person who designs levels for video games Moon Mineralogy Mapper, one of two instruments that NASA contributed to India's first mission to the Moon, Chandrayaan-1, launched October 22, 2008 Thematic Mapper, one of the Earth observing sensors introduced in the Landsat program Wisconsin H-Alpha Mapper, a custom-built 0.6 metres (24 in) telescope operated by the University of Wisconsin–Madison, used to study the Helium-alpha ions of the warm ionized medium