<human>:  When did the QWERTY keyboard first appear?
<bot>: The QWERTY keyboard was invented in 1873 by Christopher Latham Sholes. Sholes was working at the Remington Typewriter Company, which made the first commercially successful typewriter. He was trying to make a typewriter that would be easier to use. He noticed that the letters of the alphabet were arranged in a logical order on the typewriter keys, so he decided to arrange the keys in the same order. He also designed a typewriter that had a separate space bar for each letter, which was the first typewriter to have a space bar.