Comment on Lisp Koans by GoogleparentComments−muuh-gnu13yLisp became a "language internally used by Google" when Google purchased ITA with a Lisp code-base so large and Lisp-only staff so large, that it is unlikely that it will ever be rewritten or that the staff will be retrained to use Java.−gohrt13yITA had a small staff, and was not Lisp-only. They were hiring people to do Java work >5 years ago.
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Lisp became a "language internally used by Google" when Google purchased ITA with a Lisp code-base so large and Lisp-only staff so large, that it is unlikely that it will ever be rewritten or that the staff will be retrained to use Java.
ITA had a small staff, and was not Lisp-only. They were hiring people to do Java work >5 years ago.