IATSE
| Acronym | Definition |
|---|---|
| IATSE | International Alliance of Theatrical Stage Employees (New York, NY) |
| IATSE | International Alliance of Theatrical Stage Employees, Moving Picture Technicians, Artists and Allied Crafts of the United States, Its Territories and Canada |
| IATSE | Irish Association of Teachers in Special Education (est. 1969; Ireland) |
| IATSE | I Always Take Something Extra |