Jerry poses and interesting point. What is "an ordinary pocket knife?"

Years ago (and perhaps to some extent today) it brought to mind a knife something like a case stockman or similar type/sized knife.

Nowadays, a one hand opener often comes to mind.

Is ordinary dependant on geography? Could it be dependant on ones job? I am chained to an office chair every day, so I carry an SAK. My friend (and DS's Cubmaster) works outdoors with heavy equipment and such and carries a large one hand opener. Many people who work around electronics carry Multi-tools.

Point is, ordinary is very much a relative thing. But relative to what else?