| Name | Country | City | Rating | |
|---|---|---|---|---|
| Houghton Mifflin Company | 0.00 ±0.0 | |||
| Houston Atari Club | 0.00 ±0.0 | |||
| Howard W. Sams & Co., Inc. | United States | Indianapolis | 0.00 ±0.0 | |
| HRM Software | 0.00 ±0.0 | |||
| Hsu Software | 0.00 ±0.0 | |||
| Hurican Software | 0.00 ±0.0 | |||
| I/O | 0.00 ±0.0 | |||
| ICD | 0.00 ±0.0 | |||
| ICS | 0.00 ±0.0 | |||
| Ideal Systems | 0.00 ±0.0 | |||
| IDSI | 0.00 ±0.0 | |||
| IGA Soft | 0.00 ±0.0 | |||
| IJG, Inc. | United States | Upland, California | 0.00 ±0.0 | |
| IJG, Inc. (Hofacker) | United States | Upland, California | 0.00 ±0.0 | |
| Illegal Software | 0.00 ±0.0 | |||
| Illogic | 0.00 ±0.0 | |||
| Illusion Software | 0.00 ±0.0 | |||
| Illusions II | 0.00 ±0.0 | |||
| Ilmenit | Poland | 0.00 ±0.0 | ||
| Image Computer Products | 0.00 ±0.0 |
