"Operating systems come with cultures as much as codebases. I was forcibly reminded of this fact over the holidays when several family members and neighbors press-ganged me into troubleshooting their Windows computers. Although none of us had any formal computer training, and I know almost nothing about Windows, I was able to solve problems that baffled the others -- not because of any technical brilliance, but because the free software culture in which I spend my days made me better able to cope..."