Before i ended up as a cubicle dweller, i used to carry one of these around all the time on my belt:
of course, back then, i had a real job, and was working hard. ( Now i have a virtual job, and am hardly working.
)
So no, I don't carry a pocket knife, or even a multi function tool anymore. Not much of a need for it when your ass is parked in a computer chair all day, and carrying anything with a blade on it would probably get me into trouble in an office enviorment.