Science and engineering

• Multiplexing
  Multiplexing
  The multiplexed signal is transmitted over a communication channel, which may be a physical transmission medium. The multiplexing divides the capacity of the low-level communication channel into several higher-level logical channels, one for each message signal or data stream to be transferred...
  
  , combining many signals into a single transmission circuit or channel
• Multiplexer
  Multiplexer
  In electronics, a multiplexer is a device that selects one of several analog or digital input signals and forwards the selected input into a single line. A multiplexer of 2n inputs has n select lines, which are used to select which input line to send to the output...
  
  , an electronic device that accomplishes multiplexing
• Multiplex (assay)
  Multiplex (assay)
  A multiplex assay is a type of laboratory procedure that simultaneously measures multiple analytes in a single assay. It is distinguished from procedures that measure one or a few analytes at a time...
  
  , a laboratory procedure in molecular biology

Entertainment

• Multiplex (movie theater)
  Multiplex (movie theater)
  A multiplex is a movie theater complex with multiple screens, typically three or more. They are usually housed in a specially designed building. Sometimes, an existing venue undergoes a renovation where the existing auditoriums are split into smaller ones, or more auditoriums are added in an...
  
  , a large number of screens, also called a megaplex
• Multiplex (TV)
  Multiplex (TV)
  A multiplex or mux is a group of TV channels that are mixed together for broadcast over a digital TV channel and separated out again by the receiver...
  
  , a group of digital TV or radio channels that are mixed together for broadcast
• Multiplex (webcomic), an online comic about the staff of a movie theater

Businesses

• Brookfield Multiplex, an Australian-based group of property and construction companies
• Multiplex Modellsport, a manufacturer of radio control equipment and radio-controlled airplanes

Other

• Concurrency (road)
  Concurrency (road)
  A concurrency, overlap, or coincidence in a road network is an instance of one physical road bearing two or more different highway, motorway, or other route numbers...
  
  , a single physical road designated by two or more different highway numbers
• Plywood
  Plywood
  Plywood is a type of manufactured timber made from thin sheets of wood veneer. It is one of the most widely used wood products. It is flexible, inexpensive, workable, re-usable, and can usually be locally manufactured...
  
  , a covering material made by bonding layers of veneer wood
• Multiplex (juggling)
  Multiplex (juggling)
  Multiplexing is a form of toss juggling where more than one ball is in the hand at the time of the throw. The opposite, a squeeze catch, is when more than one ball is caught in the hand simultaneously on the same beat...
  
  , with multiple balls thrown/caught at one time by the same hand