I knew a guy who worked for Texas Instruments back in the day. He told me that after they created the first electronic hand calculator, they got a call from Bell Telephone. The folks from Bell were really worried. You see, when they created the first push-button phone, they did extensive tests and analyses to determine the EXACT BEST PATTERN for the number buttons. They wanted the pattern that would be the easiest for people to tap in the dark or via muscle memory. But when they saw that Texas Instruments' calculator had the exact opposite layout, Bell realized they must have blundered. "So," they asked. "What did your tests show?" The guys at Texas Instruments just gaped stupidly and said, "Tests?"