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  2. Screwdriver - Wikipedia

    en.wikipedia.org/wiki/Screwdriver

    Canadian P.L. Robertson, though he was not the first person to patent the idea of socket-head screws, was the first to successfully commercialize them, starting in 1908.. Socket screws rapidly grew in popularity, and are still used for their resistance to wear and tear, compatibility with hex keys, and ability to stop a power tool when

  3. Anabolic steroid - Wikipedia

    en.wikipedia.org/wiki/Anabolic_steroid

    Most steroid users are not athletes. In the United States, between 1 million and 3 million people (1% of the population) are thought to have used AAS. Studies in the United States have shown that AAS users tend to be mostly middle-class heterosexual men with a median age of about 25 who are noncompetitive bodybuilders and non-athletes and use the drugs for cosmetic purposes. "