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Definition: GEM


(1) See JEM and GEMS.

(2) (gem) The format for packaging Ruby programs via the RubyGems package manager. See Ruby.

(3) (Graphics Environment Manager) A early graphical user interface from Digital Research that was similar to the Mac/Windows environment. It was built into ROM in several Atari computers. The DOS version of Ventura Publisher came with a runtime version of GEM, enabling graphics-based page layout on a PC, which was not common at the time.