LTR
Langage Temps-Réel.
(French for "real-time language") A French predecessor to Ada, LTR is Modula-like with a set of special-purpose real-time constructs based on an event model. It was mentioned in the reference below.
["An Overview of Ada", J.G.P. Barnes, Soft Prac & Exp 10:851-887 (1980)].