Answer:
Several of the subsystems evolved during the program through design changes: The parachute system, essential for booster recovery, was redesigned with larger parachutes in 1983. Frangible nuts, used in the space shuttle pad hold down and release system, were redesigned in 2008.
Boolean operators are like AND,or,not,and not .
they are <span>used as conjunctions to combine or exclude keywords in a search, resulting in more focused and productive results.</span>
