Under Feldstein, who edited Mad from 1956 to 1984, the magazine skewered presidents, the Cold War, the tobacco industry, Madison Avenue advertising, Hollywood and numerous other targets. And its legacy from that time lives on. Where your sense of humor came from. Cheap tablet computers can start an euphoria on tablet computer’s market. Kindle Fire is one of the tablets, that will be available for a very low price, just $199. It has already knocked down the price of PlayBook,…