Simplex (disambiguation)

Simplex may refer to:

Biology

 * List of species named simplex, a common species name
 * Herpes simplex, a viral disease caused by Herpes simplex viruses

Companies and branded products

 * Simplex (bicycle), a French bicycle derailleur brand
 * Simplex Manufacturing Corporation, an American manufacturer of motorcycles in Louisiana from 1935 to 1975
 * American Simplex, an American automobile made in Mishawaka, Indiana, US
 * Simplex Automobile Company, a defunct luxury car manufacturer from 1907 to 1921
 * Crane-Simplex, a defunct luxury car manufacturer in New York, US at the start of the 20th century
 * Sheffield-Simplex, a British vehicle manufacturer operating 1907–1920
 * Bergmann Simplex, an early 20th-century, German-made handgun
 * Mercedes Simplex, an automobile model produced between 1902 and 1909
 * Simplex Typewriter Company, an index typewriter manufacturer
 * A trade name used by British railway locomotive manufacturers The Motor Rail & Tramcar Co Ltd
 * The trade name of the swinging-tray record changer used in Wurlitzer jukeboxes from the 1930s to the 1950s
 * A brand of fire alarm systems made by SimplexGrinnell
 * A manufacturer of jacks used in railroads and mining industries, now owned by Actuant Corporation

Mathematics

 * Simplex, a term in geometry meaning an n-dimensional analogue of a triangle
 * Pascal's simplex, a version of Pascal's triangle of more than three dimensions
 * Simplex algorithm, a popular algorithm for numerical solution of linear programming problems
 * Simplex graph, derived from the cliques of another graph
 * Simplex noise, a method for constructing an n-dimensional noise function
 * Simplex plot, a ternary plot used in game theory

Technology

 * Simplex communication, a one-way communications channel
 * Simplex signaling, signalling in which two conductors are used for a single channel
 * Simplex, using a single frequency for transmit and receive instead of an amateur radio repeater
 * SimpleX Messaging Protocol, a privacy focused messaging protocol
 * Simplex printing, printing one sided pages, a technique that is contrast to duplex printing
 * Small Innovative Missions for Planetary Exploration (SIMPLEx) program at NASA