10: 011000100110100101101110011000010111001001111001

In other words, making binary. When 1 and 0 mean a whole lot more to you than the not-so-basic concept of numerical values, this is a good nerdicator. It is quite possibly the strongest tell-tale sign that you are a nerd, and it may quite possibly cross the line into geekdom. The binary above was brought to you by this lovely converter, which allows any nerd to convert text to binary and translate binary to text. You might be thinking, "A real nerd doesn't need a converter." Touche.