Instructions: You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.
Input: Category: DESIGN 
Clue: Introduced to desktops in 1950, it was designed by Arnold Neustadter & featured a ball-bearing clutch
Output:
rolodex