Not a problem, happy to help:) I've also been skimming some MIT and DARPA memos, barring explicit mentions. Re: [1] we can infer that earlier references may ex

Not a problem, happy to help:) I've also been skimming some MIT and DARPA memos, barring explicit mentions. Re: [1] we can infer that earlier references may exist (seeing how they discuss an existing system), even though 'object-oriented' may have connoted something different at the time. Re: [5] similarly implies the term had been in use among CS-practitioners between '70 and '74. I also want to add that the '...-oriented' affix was frequently used in the 60's. For instance, 'task-oriented', 'problem-oriented', 'business-oriented', 'simulation-oriented'.[1][2] It stands to reason that 'object-oriented' would have been part of CS-parlance at the time, seeing how LISP and MACLISP implemented early 'objects'. [1] R. F. Clippinger (1962). COBOL, The Computer Journal, Volume 5, Issue 3, November 1962, Pages 177–180, https://doi.org/10.1093/comjnl/5.3.177 https://doi.org/10.1093/comjnl/5.3.177. [2]: Knuth, D. E., & McNeley, J. L. (1964). A formal definition of SOL. IEEE transactions on electronic computers, (4), 409-414: "Within a given process it is possible to have several actions going on at once; therefore, we may think of several objects on which the action takes place each in its own place in the process at any given time" (p. 409).