H-1B for specialty occupations
O and P visas for athletes, artists and entertainers
E-1/E-2 visas for foreign investors
F-1 student visas
J-1 visas for professors and researchers
I-130 petitions for immediate relatives
I-140 immigrant petitions for alien worker
VAWA petitions
I-751 petitions to remove conditions
I-485 applications to adjust status