fuel system
паливна система
Proton Exchange Membrane Fuel Cell (PEM fuel cell, PEMFC)
fire extinguishing system sprinkler system and fire alarm system
bulk fuel delivery system (BFDS)
Engine Fuel Management System (EFMS)
merchant ship communication system (mercomm system)
multiple launch rocket system (MLRS); multiple rocket launcher system
Air Force weapons system / AF weapon system
attitude-and-heading reference system / attitude and heading reference system (AHRS)
selective calling system, SELCAL system
Unmanned Aerial System / Uncrewed Aircraf System (UAS)
system of system common operating environment