SEMITORR

I saw a white van on the road the other day with the name SEMITORR painted on the side, and I thought, that's an odd name. Torr relates to how vacuous a vacuum is, so I'll bet these guys have something to do with high vacuum systems, and Semitorr means a part of a Torr, so that must mean a really high vacuum. Silly boy. Semi refers to the semiconductor industry, who are the only customers in this neck of the woods that would care about how high (strong?) their vacuum was.

From Wikipedia we have this:

The torr (symbol: Torr) is a non-SI unit of pressure with the ratio of 760 to 1 standard atmosphere, chosen to be roughly equal to the fluid pressure exerted by a millimeter of mercury, i.e. a pressure of 1 Torr is approximately equal to 1 mmHg. . . . . It was named after Evangelista Torricelli, an Italian physicist and mathematician who discovered the principle of the barometer in 1644.^[1]