Note:
"1st" refers to the First Preference in Employment-Based Immigration category (EB-1), i.e., persons of "extraordinary ability" in the sciences, arts, education, business, and athletics, outstanding professors and researchers and certain executives and managers;
"2nd" refers to the Second Preference in Employment-Based Immigration category (EB-2), i.e., professionals holding advanced degrees, or persons of exceptional ability in the arts, sciences, or business (NIW applicants);
"3rd" refers to the Third Preference in Employment-Based Immigration category (EB-3), i.e., skilled workers and professionals holding baccalaureate degrees;
"Other Workers" refers to the unskilled worker under the Third Preference in Employment-Based Immigration category;
"4th" refers to the Fourth Preference in Employment-Based Immigration category (EB-4), i.e., religious workers, certain overseas employees of the U.S. Government, former employees of the Panama Canal Company, retired employees of international organizations, certain dependents of international organization employees and certain members of the U.S. Armed Forces; and
"5th" refers to the Fifth Preference in Employment-Based Immigration category (EB-5), i.e., employment creation investors.

^*NOTE: For June, F2A numbers EXEMPT from per-country limit are available to applicants from all countries with priority dates earlier than 08MAY11.  F2A numbers SUBJECT to per-country limit are available to applicants chargeable to all countries EXCEPT MEXICO with priority dates beginning 08MAY11 and earlier than 08JUN11.  (All F2A numbers provided for MEXICO are exempt from the per-country limit; there are no F2A numbers for MEXICO subject to per-country limit.)

Note:

"1st" refers to the First Preference in Family-Based Immigration category, i.e., unmarried children of U.S. citizens over age of 21;

"2A" refers to the first subcategory of the Second Preference in Family-Based Immigration category, i.e., spouses or unmarried children under age 21 of permanent residents;

"2B" refers to the second subcategory of the Second Preference in Family-Based Immigration category, i.e., unmarried children of 21 years of age or older of permanent residents;

"3rd" refers to the Third Preference in Family-Based Immigration category, i.e., married children of U.S. citizens; and

"4th" refers to the Fourth Preference in Family-Based Immigration category, i.e., brothers and sisters of U.S. citizens.

Immediate family members of U.S. citizens, i.e., spouses, parents and unmarried children under age of 21, are not subject to the numerical restriction of visa quotas.