That is to say, the lesson of the QWERTY story remains the resilience of a design created for an outmoded technology's dictates. QWERTY is still an example of technological momentum. But the development of the design wasn't accidental or silly: it was complex, evolutionary, and quite sensible for Morse operators.
The Half Sheet cake is approximately 11 X 15 inches in size and is typically one layer thick but may come in single or multiple layers if a filling is added. Source(s): http://www.usabirthdays.com/delivery/cak...
I'm presuming you mean the typical Costco celebration cake, the kind you might get personalized for a birthday or graduation party. Michelle Tarver's answer is correct for that kind. It's a half sheet cake, finished at about 12 x 16 which they state serves 48 people, with each person getting a generous 1 x 4 slice of cake.