A different type of ^ notation is sometimes used with computers. Here the ^ means control, as in the control key. Thus ^D is a control-D, ^H is a control-H, etc.

Yet another ^ notation is used in the context of mathematics in computer programming languages. Here, the ^ stands for simple exponentiation, i.e., 2^8 is used to write 2⁸ or 256. Some languages use ** instead of ^. This notation is sometimes used for writing exponents in other contexts where superscripts are not possible, such as in node titles.

It's also frequently used to mean bitwise XOR in programming languages (Often why ** notation is used for exponentiation).