I'm now reading one book, in which author is using names for variable like "iep" (of type IfExpressionParser), or so. If the code is longer than ten or twenty l

I'm now reading one book, in which author is using names for variable like "iep" (of type IfExpressionParser), or so. If the code is longer than ten or twenty lines I need to go back to the variable definition to make sure what it really is. Not convenient reading at all.