I can be reached at contact@{this domain} or at

Snail mail can be addressed to:

Yun William Yu
Computer and Mathematical Sciences
Instructional Centre 343
University of Toronto
1265 Military Trail
Toronto, ON
M1C 1A4

My GPG Public Key 0x2270BD06 is available, though I should mention that in over a decade, no one has used it to contact me, so YMMV.

I also have public Github and LinkedIn profiles.