....those mystical Imperial sizes... A friend who works for a aerospace/defense firm says in-house they uses "standard" units. They do have one customer - NASA - which requires Metric documentation, so docs headed that way are run through a units conversion pgm first. I asked him if that had anything to do with "missing" Mars some years ago - He says not... Jack --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .