Does anyone know where the slang term "cracker" comes from?

@wlee9696 (595)
United States
September 24, 2009 12:10pm CST
I found this information in an old book. I grew up in the South and was under the same impression as most people as to where the word came from. However recently I was reading an older book and found the "true" root of the word. I was very surprised. After 50 guesses I will give out the answer.
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