A development of TeX, which deals in multi-octet Unicode characters, to enable native treatment of a wide range of languages without changing character-set.

Work on Omega seems, more or less, to have ceased: its immediate successor was to be the aleph project (though that too has stalled). Projects developing Omega (and Aleph) ideas include Omega-2 and LuaTeX.

The authors are Yannis Haralambous and John Plaice.