| Abbreviation | Definition |
|---|---|
| ISTE | International Society of Technology in Education |
| ISTEM | Institute for Science Technology Engineering and Math |
| ISTEM | Institute for Science Technology Engineering and Mathematics |
| ISTEM | Institute for Science Technology Engineering Mathematics |
| ISTEM | Interdisciplinary Science Technology Engineering and Mathematics |
| ISTEM | Invigorating Science Technology Engineering and Mathematics |
| ISTEP | Information Systems Technology Enhancement Project |
| ISTF | Innovation Science Technology For Future |
| ISTF | Integrated Space Technology Flights |
| ISTF | Internet Science and Technology |
| ISTF | Internet Science and Technology Fair |
| ISTG | Information Storage Technology Group |
| ISTN | Institute for Semiconductor Technology and Nanoelectronics |
| ISTO | Industry Standards and Technology Organization |
| ISTO | Institute for Strategy Technology and Organization |
| ISTP | Institute of Science Technology and Policy |
| ISTP | International Science and Technology Policy |
| ISTS | Initiative on Science and Technology for Sustainability |
| ISTS | Institute for Security Technology Studies |
| IT | Instructional Technology |