Permanent Labor Certification
A permanent labor certification issued by the Department of Labor (DOL) allows an employer to hire a foreign worker to work permanently in the United States. In most instances, before the U.S. employer can submit an immigration petition to the Department of Homeland Security's U.S. Citizenship and Immigration Services (USCIS), the employer must obtain an approved labor certification request from the DOL's Employment and Training Administration (ETA). The DOL must certify to the USCIS that there are no qualified U.S. workers able, willing, qualified and available to accept the job at the prevailing wage for that occupation in the area of intended employment and that employment of the alien will not adversely affect the wages and working conditions of similarly employed U.S. workers.

H-1B
The H-1B program allows an employer to temporarily employ a foreign worker in the U.S. on a nonimmigrant basis in a specialty occupation or as a fashion model of distinguished merit and ability. A specialty occupation requires the theoretical and practical application of a body of specialized knowledge and a bachelor's degree or the equivalent in the specific specialty (e.g., sciences, medicine and health care, education, biotechnology, and business specialties, etc…). Current laws limit the number of foreign workers who may be issued a visa or otherwise be provided H-1B status to 65,000.

H-1C
The Nursing Relief for Disadvantaged Areas Act of 1999 (NRDAA) allowed qualifying hospitals to employ temporary foreign workers (nonimmigrants) as Registered Nurses (RNs) for up to three years under H-1C visas. Only 500 H-1C visas could be issued each year during the four year period of the H-1C program (2000-2004). The sponsoring employer paid a filing fee of $250 for each application filed with the DOL. H-1C nurses were admitted for a period of three years; the law did not provide for an extension of that time frame.

H-2A
The H-2A temporary agricultural program establishes a means for agricultural employers who anticipate a shortage of domestic workers to bring nonimmigrant foreign workers to the U.S. to perform agricultural labor or services of a temporary or seasonal nature. Before the U.S. Citizenship and Immigration Services (USCIS) can approve an employer's petition for such workers, the employer must file an application with the Department stating that there are not sufficient workers who are able, willing, qualified, and available, and that the employment of aliens will not adversely affect the wages and working conditions of similarly employed U.S. workers. The statute and Departmental regulations provide for numerous worker protections and employer requirements with respect to wages and working conditions that do not apply to nonagricultural programs. The Department's Wage and Hour Division, Employment Standards Administration (ESA) has responsibility for enforcing provisions of worker contracts.

H-2B
The H-2B nonimmigrant program permits employers to hire foreign workers to come to the U.S. and perform temporary nonagricultural work, which may be one-time, seasonal, peak load or intermittent. There is a 66,000 per year limit on the number of foreign workers who may receive H-2B status during each USCIS fiscal year (October through September). The process for obtaining H-2B certification is similar to, but less extensive and time consuming, than permanent certification.

D-1
Performance of longshore work at U.S. ports by D-1 crewmembers on foreign vessels is generally prohibited with few exemptions. The Department of Labor is responsible for administering two of those exemptions. Employers in these ports are required to file an attestation with the Department of Labor, to:

Chief, Division of Foreign Labor Certification
Employment and Training Administration
U.S. Department of Labor, Room C-4318
200 Constitution Avenue, NW
Washington, DC 20210.

The attestation should state that the use of alien crewmembers to perform longshore work is the prevailing practice for the activity at that port, there is no strike or lockout at the place of employment, and that notice has been given to U.S. workers or their representatives. Another exception requires that, before using alien crewmen to perform longshore activities in the State of Alaska, the employer will make a bona fide request for and employ U.S. longshore workers who are qualified and available in sufficient numbers from contract stevedoring companies, labor organizations recognized as exclusive bargaining representatives of U.S. longshore workers, and private dock operators.

I'm sorry did I miss something?I thought these were guest worker programs.
Oh I forgot I'm an American citizen and my government has to speak for me.