First there were ad&d...
Then came the hacked d&d to prevent loopholes...
Then there was hdd3, for much more better structured system...
Now here is epic d&d, for really epic campaigns
edd is a dungeon crawl system meant for high-level fantasy adventures. It has been made obsolete by edd2 and reader's are advised to use that system instead, and only use these pages to fulfill parts that has not been transfered to edd2 (parts of bestiary mainly).