| Acronym | Definition |
|---|
| TISA | Top Image Systems, Ltd. (stock symbol; formerly TPM) |
| TISA | Tax Incentivised Savings Association (UK) |
| TISA | Transitional Islamic State of Afghanistan |
| TISA | Trade in Services Act |
| TISA | Troop Issue Subsistence Activity |
| TISA | Traveller Information Services Association |
| TISA | Time Interpolation and Spatial Averaging |
| TISA | Truth in Savings Act of 1991 |
| TISA | Trent International Student Association |
| TISA | Temporal Interpolation and Spatial Averaging |
| TISA | Total Interior Systems of America |
| TISA | Tottenham Independent Supporters' Association (UK) |
| TISA | Telecom Industries Service Association (India) |
| TISA | Technique for Interactive Systems Analysis |
| TISA | The Institute for Social Accountability (Kenya) |