Please note that dm.lsst.org now redirects to https://www.lsst.org/about/dm
It has been bought to my attention that dm.lsst.org has become out of date. Meanwhile we have dm pages with much of the same information on lsst.org. We do not wish to maintain two websites with general informaiton. The Stack installation documentation is on pipelines.lsst.io
Please let me know if there is missing information - we are working on updating things like key numbers.