| Abbreviation | Definition |
|---|---|
| ISP | In System Programming |
| ISPA | International Software Process Association |
| ISPE | Instant Support Professional Edition |
| ISPL | Incremental System Programming Language |
| ISPON | Institute of Software Practitioners of Nigeria |
| ISPT | Integrated Self-Paced Training |
| ISQL | Interactive Structured Query Language |
| ISR | Incremental Software Release |
| ISR | Institute for Software Research |
| ISRI | Institute For Software Research International |
| ISS | Intelligent Software Solutions |
| ISSD | Interactive Software for Structural Design |
| ISSE | Innovations in Systems and Software Engineering |
| ISSEP | Integrated Systems and Software Engineering Process |
| ISSI | IBM Standard Software Installer |
| ISSI | Innovative Software Solutions Inc |
| ISSI | Integrated Software Solutions Inc |
| ISSI | International Software Systems Inc |
| ISSL | IBM Software Services for Lotus |
| ISSP | In System Serial Programming |