math: 258
stackoverflow: 120
superuser: 54
askubuntu: 51
rpg: 41
physics: 31
serverfault: 28
english: 23
mathoverflow.net: 23
apple: 22
ell: 19
electronics: 18
puzzling: 17
unix: 17
codegolf: 13
mathematica: 13
crypto: 13
wordpress: 12
diy: 12
salesforce: 12
german: 12
travel: 12
dba: 11
philosophy: 11
ethereum: 10
softwareengineering: 9
worldbuilding: 9
meta: 9
chemistry: 9
quant: 8
dsp: 7
scifi: 7
buddhism: 7
datascience: 7
sharepoint: 7
android: 7
rus: 7
gaming: 6
movies: 6
tex: 6
aviation: 6