plural of world-system

(rail transport) On railways, a system by which the track is divided into sections of three or four miles, and trains are run by the guidance of electric signals so that no train enters a section or block before the preceding train has left it.

An electromechanical system with nanometre-sized components verging down to molecular- and atomic- sized in a submicron-sized system, smaller than MEMS units.

an electromechanical system composed of micron-sized components (of the range 1μm–100μm) in a millimetre-sized system (of the range 0.02mm–1mm)

plural of nanoelectromechanical system

the field of nanoelectromechanical systems

plural of microelectromechanical system

the field of microelectromechanical systems

A taxonomic classification system for flowering plants.

plural of Lindenmayer system