which libraries do you use that are older than yourself?
are you very young and do you intend to die soon?
are you very young and do you intend to die soon?
BSD derived works (including parts of MacOS, Windows and GNU/Linux, and numerous embedded devices like routers etc.) are still going strong today.
Most of the code will have been gradually replaced over such a long time, but there are libraries which can trace a lineage that far back. libc and libm come to mind.
Quite a few well known, non-trivial applications still used today were, perhaps surprisingly, first released in the 1970s. Examples: grep, diff, cron, awk, make.