You all probably know about Windows' ability to render any character by specifying it's ASCII code using the numpad. To do so, you press and hold the Alt key while sequentially pressing the numbers that make up the ASCII code on the numpad. So if I press and hold Alt, then I press 1 then 2 on the numpad and release Alt, I get male sign (♀).
My question is, what is the defined behaviour for pressing more than one keys at the same time? Because if I try the same thing but instead press 1 and 2 at the same time instead of sequentially, I get a section sign (§). What's up with that?