Thou

[55fairlane]

Speaking of thou's . Been watching all the NHRA races on FT1 channel lately . 11,000 horsepower , 330 MPH and lose by a thou of a second and have to go home empty handed . No Wally .

I drove NHRA alcohol funny cars for several seasons

 

[55fairlane]

Why do machinists call everything a "thou?" 0.1
0.01
0.001 are all called a thou. I never hear, "Take off a tenth," or "Take off a hundredth"

A "thou" is .001 and a tenth is .0001 ......