math: 454
stackoverflow: 251
superuser: 97
askubuntu: 74
physics: 70
serverfault: 53
english: 51
apple: 44
codegolf: 36
workplace: 30
unix: 27
gis: 22
rpg: 20
drupal: 20
electronics: 19
judaism: 18
mathoverflow.net: 18
travel: 18
interpersonal: 17
worldbuilding: 17
dba: 16
salesforce: 16
sharepoint: 15
es.stackoverflow: 14
webapps: 14
graphicdesign: 13
bitcoin: 13
chemistry: 12
ell: 12
security: 12
wordpress: 11
ethereum: 11
academia: 11
money: 10
arduino: 10
stats: 10
pt.stackoverflow: 9
gaming: 9