Hate is a strong word, but I mean it here. Seeing HN in code gives me a headache and puts me in a grumpy mood. Why? Because it makes code ugly and hard to read. If this is what the Hungarian language looks like I feel sorry for Hungarians.

It's useful when you're coding in a language that isn't strongly typed, like VBScript. But what's the point of it in a strongly typed language? The variable's type is clearly recorded when you define it, and in a modern IDE like Visual Studio, you'll see it when you bring up the tooltip for any instance of the variable. In addition to it being redundant, it's an extra annoyance when you're thinking up a name for your variables. There are too many three letter combinations to remember and too few to cover all the types and classes available to you. Life is too short to waste time thinking up redundant unique three letter prefixes.