| #6319 | Insight Software | Z |
| #23027 | Insomniac | - |
| #6320 | Instant Products | Z |
| #6321 | Instituto de Ciencias de la Educacion | Z |
| #6322 | Instytut Wydawniczy Zwiazkow Zawodowych | Z |
| #6323 | Intech | ? |
| #6324 | Integer Research | Z |
| #6325 | Integrity Solutions | ? |
| #6326 | Intellicreations Inc | Z |
| #6327 | Intelligent Design Ltd | Z |
| #6328 | Intelligent Program | ? |
| #6329 | Intelligent Software Ltd | Z |
| #21697 | Intense | + |
| #19972 | Inter-Pacific Systems Inc | Z |
| #6330 | InterComplex | ? |
| #6331 | Interactive Components Ltd | Z |
| #6332 | Interactive Instruments Ltd | H |
| #6333 | Interactive Software People | P |
| #6334 | Interactive Technology | Z |
| #6335 | Interbit Software | Z |