The set of Natural Numbers is denoted by $\mathbb N$ (For Natural)
The set of Rationals are denoted by $\mathbb Q$ (for quotient)
The set of Complex numbers are denoted by $\mathbb C$ (for complex)
The set of Real numbers are denoted by $\mathbb R$ (for Real)
Why is the set of integers denoted by $\mathbb Z$?
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$\begingroup$I typed "Integers" into Google. The first hit was Wikipedia.
In the second paragraph it says "The set of all integers is often denoted by a boldface Z... which stands for Zahlen (German for numbers)."
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