| ITAA | Income Tax Assessment Act 
| Others |
| ITAA | Information Technology Association of America
| Others |
| ITAA | Information Technology Assurance Administration
| Others |
| ITAA | International Tattoo Artists Association
| Others |
| ITAA | International Textile and Apparel Association
| Others |
| ITAA | International Textiles and Apparel Association
| Others |
| ITAA | International Therapist Authorization Association
| Others |
| ITAA | International Transactional Analysis Association
| Others |
| ITAA | International Trial Attorneys Association
| Others |
| ITAA | Internet and Technology Addiction Anonymous
| Others |
| ITAA | Internet and Technology Addicts Anonymous
| Others |
| ITAA | Internet Tech Addiction Anonymous
| Others |
| ITAA | Interpreters and Translators Association of Alabama
| Others |
| ITAA | Intranasal Triamcinolone Acetonide Aerosol
| Others |
| ITAA | Iowa Textile and Apparel Association
| Others |
| ITAA | Irish Travel Agents Association
| Others |