绿卡

Perm:
查状态:
http://www.permtrackr.com/search#?company=MicroStrategy
https://icert.doleta.gov/
https://www.permchecker.com
http://www.permtrackr.com/search
http://dolstats.com/
https://icert.doleta.gov/index.cfm?event=ehLCJRExternal.dspLCRLanding

常识：
http://www.moonbbs.com/thread-520785-1-1.html

A-15189-xxxxx
A means PERM
15 means 2015
189 means July 8th, the 189th day in 2015
On permtrackr, there is a link to each case, you can check the school etc. there.