Why did the Angstrom fall out of favor as a unit of measurement?

[David_Simmons]

@robby

That’s not true. The U.S. Customary System (USCS) is still used by most engineers in the U.S. In this system, the unit for force is the pound-force (lbf) and the unit for mass is the pound-mass (lbm). I’ve never seen slugs used in engineering.

:We never used anything for mass but slugs. Equal to the weight in pounds on the earth’s surface divided by the acceleration of gravity.

[LouisB]

I used Angstroms in calculating the frequency shift of a quartz crystal vs the thickness of electrodes. And vice versa.

[NE_Texan]

@gazpacho

Really? I work in the chip business all I every see now is nm down from um a few years ago.

Yeah, I’m in the chip business, too. Circuit widths and sizes are nm, but some film thicknesses it’s more convenient to use Angstroms. Not that conversion’s a big deal, it’s just a factor of 10.