math: 187
stackoverflow: 99
physics: 46
superuser: 41
askubuntu: 28
unix: 26
electronics: 23
ell: 20
mathematica: 17
serverfault: 14
wordpress: 13
webapps: 12
ethereum: 11
quantumcomputing: 11
mechanics: 11
apple: 10
travel: 10
english: 10
music: 9
worldbuilding: 9
datascience: 8
salesforce: 8
workplace: 8
stats: 7
chemistry: 7
arduino: 7
diy: 7
drupal: 6
mathoverflow.net: 6
islam: 6
dba: 6
money: 5
codegolf: 5
cs: 5
writing: 5
ru.stackoverflow: 5
raspberrypi: 5
gamedev: 5
academia: 4
es.stackoverflow: 4