(computing) A software system for the creation, management and transfer of learning content.

plural of ground proximity warning system

Slogan for the reunification of China as one country, but with areas like Hong Kong and Taiwan with separate economic and political systems.

(construction) A system of drains and moisture barriers used to regulate the hydrostatic pressure in the earth surrounding a below-grade structure.

plural of hydrostatic pressure relief system

(mathematics) The real number system adjoined with two extra symbols: ∞ and −∞, inheriting the ordering of the real number system, and defining −∞ to be less than any real number, and ∞ to be larger than any real number.

A system of railroad equipment designed to ensure safety by monitoring locations of trains and locomotives, providing analysis and reporting, and automation of track warrants and similar orders.

plural of name-based type system

(software) Synonym of nominative type system

An air conditioner where the inside-environment (evaporative) heat exchanger is separated by some distance from the outside-environment (condensing unit) heat exchanger.