Secret codes for spies?
Althought we are not spies, we still use lots of codes,such as bar codes .
when we go to the supermarket ,we can see the bar codes on the goods.
according to my major in high school, I know that the function of bar
codes is to show where the good made in and it pattern.
Morse codes is one of the famous codes, we knnow it's function is for communicating each other secretly.From World War. Morse code is still used today.
In this article we can know what the Enigma machine is .
A number of the England's brightest scientists and mathematicians were recruited to break the job.However, no one knew what their job excetly is, because they have to take their job as top secret.
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