[magduf]

For some odd reason, a lot of mechanical engineering and machining in the US is still done in inches and feet, though I think most of it is related to the defense sector. If you get into the automotive sector, for instance, you won't see that any more; they finally went all-metric in the 90s or so. Anything where the product is going to be sold internationally is probably metric.

In other engineering disciplines (except maybe civil), it's all metric. You won't hear EEs talking about semiconductor feature sizes in fractions of an inch.