dwheeler writes: "I've just posted a major update of my paper, ``Why Open Source Software / Free Software (OSS/FS)? Look at the Numbers!'' Many sites give qualitative reasons for using OSS/FS, but this paper emphasizes quantitative measures (such as experiments and market studies) on why using OSS/FS products is, in a number of circumstances, a reasonable or even superior approach. The paper covers market share, reliability, performance, scaleability, security, and total cost of ownership." Bookmark this for the next time your boss asks.