Doing a clean uninstal of apps

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Galaxy S is my first Android device, so please excuse my noob-question:

I just try alot of apps and most of them will be uninstalled by me a few days later. Does Android do a "clean" uninstall, or are there still bits and pieces in something like a registry (yes I am a windows-user ;)). Or does that depend on the uninstall-method which is provided by the individual app-developer?

Due to the fact that there is no "General Android" - Forum I will post my question in this forum which at least corrsesponds to my current device.

Thanks for your insight.

quicky

This is funny because I also wonder everytime I delete if there are registry pieces missing lool. but I'm sure that doesn't matter.. There are however SOMETIMES folders IN the SD card or the external Drive of a phone (like the 8gb/16gb partition of the Galaxy).
All android phones are like that, sometimes they leave a folder with settings or sometimes empty folders, and sometimes no folders at all.
I think it's just to keep cache or settings.. you can simply delete those when you enter your sd card.

In Android, every app has his own "sandbox". This is like a exclusive folder for the app, where it stores everything and other apps can't access.

When you remove an app from the phone, android removes this "folder" so there is nothing left behind.

There is just one exception to this: the SD card. Some programs will store some information (for example heavy games store maps, voices,...) to a folder in the SD card. So when uninstalling just look if your SD card contains some folder with the app name and safely remove it too (unless you plan reinstalling the app later!).