LEMO is both the name of an electronic and fibre optic connector manufacturer, based in Écublens, Switzerland, and the name commonly used to refer to push-pull connectors made by that company. LEMO connectors are used in medical, industrial, audio/visual, telecommunications, military, scientific research and measurement applications. The company, founded in 1946, started as a manufacturer of contacts in noble and rare metals. The company took its name from the company founder, engineer Léon Mouttet.
LEMO has set several connector standards.
The LEMO 00, a miniature push-pull 50Ω coaxial connector, is used as front panel connectors in the Nuclear Instrumentation Module (NIM) and Computer Automated Measurement and Control (CAMAC) modular electronics standards used in instrumentation for nuclear and particle physics, where it is used as a replacement for BNC connectors in high density designs (because the LEMO connector is much smaller in size than a BNC).
Due to the modular nature of LEMO connectors, many configuration options are available across the sizes and ranges, with new connector ranges being designed and becoming available on a regular basis, such as LEMO's Tiny Trio .
While LEMO connectors were generally developed as proprietary designs, the legal status of many of the older designs is not clear. For example, the LEMO website itself shows a standardisation date of 1970 for the LEMO 00 model. The "chocolate plate" design of the connector's shell grip is, however, trademarked. 
- LEMO Group company website
- LEMO UK website
- LEMO UK Broadcast Connections Solutions Brochure
- SMPTE Compatible HDTV Connection System 3K.93C Series
- LEMO Unipole_Multipole Catalogue
- LEMO UK Finished Camera Cable Assembly (FUW.3K.93C to PUW.3K.93C) Stock Situation