Maybe it's heresy but it wouldn't occur to me to carry a PSK in business clothing. Is my office going to suddenly be teleported to a desert island or something? I usually have my keychain in my pocket, that includes a small knife and an LED flashlight; and a cell phone in another pocket. No GPS or fishing equipment--I just don't expect to need those in any emergency that might arise in the middle of downtown. A few years ago there was a blackout at work and it would have been nice to have a radio to be able to get some news about progress getting power restored to that part of the city. A few days later I brought a small radio to work and tossed it in my desk drawer, but I don't think I ever used it in the rest of the time I worked in that place.