Ah, the good old days, when it was de rigeur to stick a knife-blade onto every single object one carried, back before the era of aviation confiscation totum:
Eight distinct purposes are served by the versatile pocket case, illustrated above. A cigarette compartment occupies the center, supplemented by a concealed writing tablet, a telescoping pencil, and a stamp container. In addition the case contains a five-inch rule, a lighter, a pocket knife, and a watch. The entire outfit folds flat into small enough space to fit the palm of the hand and is so small that it can easily be slipped into your vest pocket exactly as an ordinary cardcase is carried.
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.