A Survey of Computer Programming Languages Currently Used in the Department of Defense
   In June 1994, the Assistant Secretary of Defense for Command Control, Communications, and Intelligence commissioned a programming language survey of the Department of Defense (DoD).
   http://www.stsc.hill.af.mil/crosstalk/1995/10/Survey.asp

History of Ada
   Contains a large number of links to historical documents and notes about early Ada.
   http://www.adahome.com/History/

History of the Ada Programming Language
   Contains a timeline listing various milestones for Ada.
   http://www.cs.fit.edu/~ryan/ada/ada-hist.html