Glulx
The Glulx specification
was written by Andrew Plotkin as an attempt to define a format for interactive fiction games that
the Inform compiler could compile to, without the limitations of its original output format, Infocom's
Z-Machine.
Windows Git is based on Iain Merrick's Git 1.3.6, which is a complete implementation of version 3.1.2
of the Glulx specification.
More information on Glulx is available from the Glulx web page:
http://www.eblong.com/zarf/glulx/