Speaking from a "white collar" world, you'd be amazed how much gear can be stashed in the pockets or velcro-ed into a zippered DayRunner organizer. I think I've covered all the groups - signaling, fire, sharps, meds, etc., and it's all very innocent looking on my desk. I carry it everywhere. There's a world of urban trouble out there - I learned my lesson years back when I got car-jacked and left in the middle of nowhere with no keys, no money, and no ID. I've carried my own version of a pocket PSK ever since.