The issue of designing a collaborative task manager needs to also take into account real data from previous experiments where collaborative behavior took place. One of the issue is the sizing of the application. Soon into our experiment (in 2002), we jokingly came up with the DC law that stated that the size of the conversation threads between collaborating parties was 1/1000 th the size of the documents attached to these conversation threads. As of today, four years later, the size of the "library" of documents is 22.17 GB. The size of the conversation threads is 18.66 MB. Close enough. This is somewhat amazing that the "law" still holds. Indeed, in a matter of four years, new formats have appeared in the archives: MPEGs or very large JPEGs, yet the scaling still holds.
