Types of Operating Systems Used by Undergraduates to Collect Data in Lab Classes
| Macintosh Operating System | Endorsement of System | PC Operating System | Endorsement of System |
| Mac OS 6.5 or earlier | 4.4 | PC Dos | 17.3 |
| Mac OS 7.5 | 18.1 | PC Windows 3.1 or earlier | 22.1 |
| Mac OS 7.6 | 16.4 | PC Windows for Workgroups 3.11 | 16.4 |
| Mac OS 8.0 | 15.0 | PC Windows 95 | 57.5 |
| Mac OS Other | 1.3 | PC Other | 8.0 |