(*) By “Unix”, I mean Linux, Unix, AIX, OS/X, and similar flavours. Way back when, about twenty or so years ago, I was a Unix admin, and a Unix developer. I had to be both, because I was the only person in the company who could spell Unix. My favourite game was to go along to presentations for Microsoft Windows ‘new features’ and say “Oh, but hasn’t Unix had that for the last twenty years?” Sure enough, there were countless things that Windows users and developers