| Visiting International Student Ambassadors | Academic & Science |
| Volunteering International Students Assistance | Academic & Science |
| Volunteers for International Student Affairs | Academic & Science |
| Visa International Services Association | Business |
| Vision, Integrity, Structure, and Accountability | Business |
| Volunteers In Service Abroad | Business |
| Virtual Information Skills Activity | Community |
| Volunteers In School Activities | Community |
| Very Important School Assignment | Community |
| Vatican International Services Agency | Community |
| Visitor Intending to Stay Abroad | Community |
| Visitors International Stay Admission | Community |
| Virtual Instrument System Architecture | Computing |
| Visa International Service Association | Finance |
| Visualization of Inter-Spike Association | General |
| Virtual Important Stamp for Authorisation | General |
| Vocational Initiative and Social Awareness | General |
| Visions Inspire Success And | General |
| Visions Inspire Success and Achieve | General |
| from the Latin word “charta visa”, meaning verified paper, paper that has been seen | Governmental |
| Victorian Institute of Sport Assessment | Governmental |
| Various Institutions Sign Agreement | Governmental |
| Verified International Stay Approval | International |
| Visitors Internationally Stay Allowance | Internet |
| Vancomycin Intermediate Staphlococcus Aureus | Medical |
| Vancomycin Intermediate Staphylococcus Aureus Infection | Medical |
| Vancomycin intermediate Staphylococcus aureus | Medical |
| Voluntary Intermodal Sealift Agreement | Military and Defence |
| Virtual Instrument Software Architecture | Softwares |
| Vacation Insurance Savings Account | Stock Exchange |