AC21: American Competitiveness in the 21st Century.

AD: Approval Date.

AFAIK: As Far As I Know.

AOS: Adjustment of Status.

AP: Advance Parole.

BEC: Backlog Elimination Center.

CSC: California Service Center.

DHS: Department of Homeland Security.

DOJ: Department Of Justice.

DOS: Department Of State.

EAD: Employment Authorization Document.

FP: Fingerprinting.

GC: Greeeeen Caaaaard!!

IMHO: In My Humble Opinion.

IMO: In My Opinion.

INS: Immigration and Naturalization Service (now USCIS).

IO: Immigration Officer.

LC: Labor Certification.

LPR: Lawful Permanent Resident.

LUD: Last Updated Date.

LWOP: Leave Without Pay.

MSC: Missouri Service Center (=National Service Center).

MTR: Motion To Re-open.

NC: Name Check.

ND: Notice Date.

NOID: Notice Of Intent to Deny.

NSC: Nebraska Service Center.

PD: Priority Date.

RD: Receipt Date.

RFE: Request For Evidence.

ROW: Rest Of the World.

TSC: Texas Service Center.

USC: United States Citizen.

USCIS: United States Citizenship and Immigration Service (formerly INS).

VB: Visa Bulletin.

VSC: Vermont Service Center.

WOM: Writ of Mandamus.