Wham-O called their new product the Hula Hoop. (The name had been used since the 18th century, but till then had not been registered as a trademark.) The Hula-Hoop became the biggest toy fad in modern history. Twenty-five million were sold in four months, and in two years sales reached more than 100 million. "Hula Hoop mania" continued through the end of 1959, and netted Wham-O US$45 million (US$346M adjusted for inflation to 2012). Shortly thereafter, the company had another huge success with the Frisbee. In 1955, inventor Fred Morrison began marketing a plastic flying disc called the Pluto Platter. He
Hard disk drive platter Hard disk drive platter A hard disk drive platter (or disk) is the circular disk on which magnetic data is stored in a hard disk drive. The rigid nature of the platters in a hard drive is what gives them their name (as opposed to the flexible materials which are used to make floppy disks). Hard drives typically have several platters which are mounted on the same spindle. A platter can store information on both sides, requiring two heads per platter. The magnetic surface of each platter is divided into small sub-micrometer-sized magnetic regions, each of which is used to