One of my favourite things about the chewy Unix core of OS X is all the bizarre comman line utils floating around in there. Jonathan Rentzsch writes about
uuidgenin What A Universally Unique Product Name!.
UID stands for "Uli's Unique Item Description". Young Uli originally invented it on a TRS-80 model 100 while on holiday in the Harz mountains, for the purpose of naming every bacterial species he scraped off his boots.Lol.