We've all heard the term 'Human Edited Directory', make famous by the pre-google search engine, DMOZ. But what exactly does it that mean? Basically that means that in this world of spam bots on steroids trying to take over the world, an actual human being will take a look at all submissions, and approve or disapprove them accordingly. This makes these types of directories better because you know they are not filled with a million+ bot submitted spam links letting you know where the best place to buy Viagra is. www.traffic-plus.com is an example of a solid PR3, human edited directory, with useful links.