Within my professional working enviornment, I work with Imperial, American and SI units. The Imperial system used includes Whitworth (BSW and BSF) and BA, Unifiedthread, UK gallons and pounds. The American system used includes AF, AN, MS, US gallons. The Metric system as we all know includes mm, Kg, N/M etc etc etc.
OK, so I can use all these systems. Getting back to the point of this thread, YES I would like to see one standard system of units used. If for no other reason, it would stop Mr Snap-on etc making three times the money out of me.