[j_s]

https://en.wikipedia.org/wiki/SQLite#History

>used aboard guided missile destroyers [...] operated without installing a database management system or requiring a database administrator

PS. Thanks to your question, today I re-discovered https://unqlite.org, which may fulfill a requirement I've been facing for some time. Awesome!

[seangrogg]

Hey hey, unqlite looks pretty interesting. I'm both glad you were able to rediscover it and glad that I can have fun reading about it!