The process of applying for a green card or adjustment to lawful permanent residence in the United States depends on the immigration path chosen by the immigrant. The United States Citizenship and Immigration Services (USCIS), an agency within the Department of Homeland Security, coordinates the issuance of lawful permanent residency and visas for foreign nationals. The USCIS offers two basic paths to lawful permanent residence, immigration through family and immigration through employment. For immigration through employment, an eligible foreign national must be sponsored by a U.S. employer. The employer first files a labor certification request, Form ETA 750, with the Employment and Training Administration of the Department of Labor. Once the employer receives certification, he submits it with Form I-140, Petition for Alien Worker, to USCIS in order to secure the immigration visa. For immigration through family, the foreign national must be sponsored by a family member who is a U.S. citizen or lawful permanent resident. The immigration visa is coordinated through USCIS upon submission of Form I-130, Petition for Alien Relative. The immigration through family process is biased based on a preference system for the assignment of visa numbers which is based on the sponsor's citizenship and the type of relationship that the sponsor and the foreign national share.