| Visa> | Designation | Uses | Max. Stay |
| B1 | Business Visitor | For business people making sales, conducting negotiations, attending meetings and seeking investments. | 6 months |
| H1B | Speciality Occupation Worker | For individuals having the equivalent of a US bachelor degree (Foreign degrees and/or work experiencemay be found to be equivalent to a US bachelor degree). | 6 Years |
| L1A | Intra Company Transferee | For executives or managers who have worked for at least one year in the past three for a foreign parent, subsidiary, affiliate, or branch office of the US company that will employ them. | 7 Years |
| L1B | Intra-Company Transferee |
For specialized knowledge employees who have worked for at least one year in the past three for a foreign parent, subsidiary, affiliate, or branch office of the proposed US employer. | 5 Years |
| E1 | Treaty Trader | For staff to direct and develop import / export trade between the US and the treaty country. | Indefinite (2 - year increments) |
| E2 | Treaty Investor | For staff to direct and develop investments made in the US by a treaty country national/company | Indefinite (2 - year increments) |
| Permanent residence | First Preference Priority Worker | For international managers and executives. Also for aliens with extraordinary ability and outstanding Professors/Researchers. | Permanent |
| Permanent residence | Second Preference Priority Worker | Professionals with advanced degrees or those with exceptional ability in the sciences, arts or business. | Permanent |
| Permanent Residence | Third Preference Worker | Professionals with basic degrees, and skilled workers. Also "other workers" who have less than two years of relevant experience. | Permanent |
| 'TN1' | Canadian Professional | For Canadian professionals and managers. | Indefinite (1 year increments) |