That number identifies the software bundle that came with your computer. This numbering system is being used on all Macintosh computers at this time. Here is a chart that lists the software bundle number associated with each iMac release.
| Configuration | Software Bundle |
| Original iMac (/A version) | 694-1108 |
| Original iMac (/B version) | 694-1134 |
| iMac 266 | 694-1155 |
The Apple System Profiler also provides this information in its Product Information section, listed under "Bundled Software".