Imperial system and USA

[AFTT47]

Well, there IS the well-known popularity in the US of the 9mm bullet...

Boru

You jest but there are actually a lot of examples of that kind of thing. We use Celsius when talking about CPU temperature, for instance. A more mainstream example is bottles of soft drinks which are more often measured in liters now. You'll see the metric size with the imperial units in parenthesis. Automobile engines are measured in liters of displacement now rather than cubic inches, a trend which began in the late 1970s.

The metric system is slowly sneaking its way in here, one millimeter at a time.