What is the X in X-mas?
from Latin Ilias (genitive Iliadis), from Greek Ilias poiesis "poem of Ilion" (Troy), literally "city of Ilius," the mythical founder.
A real-time language.
["On the Design of a Language for Programming Real-Time Concurrent Processes", H.A. Schutz, IEEE Trans Soft Eng SE-5(3):248-255, May 1979].