math: 411
stackoverflow: 350
superuser: 143
askubuntu: 95
electronics: 80
physics: 74
unix: 69
rpg: 69
scifi: 61
salesforce: 54
movies: 53
serverfault: 53
english: 52
worldbuilding: 52
mathematica: 46
dba: 42
diy: 41
mathoverflow.net: 36
ell: 35
wordpress: 34
security: 33
datascience: 28
apple: 27
money: 26
es.stackoverflow: 25
travel: 25
judaism: 23
french: 22
webapps: 21
graphicdesign: 18
workplace: 18
android: 18
cs: 18
writing: 17
codegolf: 17
raspberrypi: 16
softwareengineering: 16
academia: 16