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Frank McNamara had the idea of the credit card when he was out for dinner with a partner. When his partner forgot his wallet, McNamara had the idea for the credit card, his idea was to have a card that is accessible at all times with money on it. -
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Film was the only medium available for recording television programs. Charles Ginsburg led the team that developed a new machine that could run the tape at a much slower rate because the recording heads rotated at high speeds. This allowed the high-frequency response that was needed. -
The transistor radio was useful for it being pocket sized, and you could listen to music anywhere. In 1954 they became the most popular electronic communication device in history. -
The "black box" was a flight recorder. It was made to record the flight crew's conversations. -
The first computer hard disk was used in 1956. The drive only had 5MB of data at 10,000$ a megabyte.