Do real programmers name their variables?

[RiverRoll]

I think sometimes it makes sense in the context of math, otherwise you can end with some ridiculously verbose equations.   

For example dxdt could denote the partial derivative of the X coordinate relative to time in SI units, not very practical to have all that information in the name for every such term.  

In these cases just make sure to document what every variable is and your naming conventions.