in reply to This year I plan to learn about:
I would like to learn something about Perl's guts. It would also be amusing to try to port it to the throroughly obsolete, but interesting, Univac 1108
At that time  the chief engineer was almost always the chief test pilot as well. That had the fortunate result of eliminating poor engineering early in aviation.—Igor Sikorsky, reported in AOPA Pilot magazine February 2003.