Welcome to the programming trivia community! This will be a spot where you can post questions related to the instance and others will have a chance to guess answers
Answers should be given in the comments around a day after the question was posted and do not look up answers on search engines if you are answering it. Just post a guess for what you think the answer is in the comments
Ill be doing daily questions (and will do some more today + tomorrow to start the community off) but feel free to post your own as well
To start off heres a history-related question, enjoy!
Click to reveal answer
And the answer is FORTRAN. The question was a bit vague but fortran was the first commercially available language (being commercially released in 1957) and was extremely prevalent in the 1960s for science and engineering. COBOL was close but not as popular as FORTRAN (plus released later) and BASIC was mainly used in education settings with not getting more popularity until much later