First Handheld Calculator
The first scientific pocket calculator hit the market in 1972. It was the HP 35. It got its name for its 35 keys. At $395 it was a bestseller with a million units sold in the first year.
The Supersonic Speed Machine
Can you imagine flying from London to Los Angeles in under four hours? It sounds like a thing ... more
Stock Market Crash of 1929
Stock prices spiraled out of control and the stock market crashed on October 29, 1929. Black ... more
