Competitive Service versus Excepted Service Positions. There are two types of non-executive positions in the federal government: 1) those that are in the competitive service, and 2) those that are in the excepted service. Competitive Service â Competitive service positions are subject to the civil service laws passed by Congress.
Post to Facebook. Kevlar inventor Stephanie Kwolek dies at 90 Stephanie Kwolek, the DuPont scientist whose invention, Kevlar, has saved countless lives as the essential ingredient in body armor, has died. Kwolek, of the Sharpley neighborhood in Talleyville, died Wednesday following a brief illness, said her friend, Rita Vasta, who is handling Kwolek's affairs. She was 90.
And, multiple people may have been involved in the invention of Tang. One of them is William Bruce James, a chemist who worked for General Foods. He also invented several Jell-O flavors. Another person who was involved with the invention of Tang is William A. Mitchell, who also invented Pop Rocks. William Mitchell has been involved with around 70 patents. These two seem to be the key people involved in the invention of Tang, according to the available information.