Business Web directory have been around for quit some time starting with Dmoz. The big benefit of Dmoz is that it is an open source SEO-friendly Web directory By open source I mean it is free to get into. It is not easy to have your site included in Dmoz but I recommend that every give it a shot. The websites that do get included will surely see reap so big benefits. It's not unheard of for webmasters to purchase domain names just because they are indexed in Dmoz.
Internet link directories are websites that have a sorted list of websites by specific categories. Internet directories are mostly used to find information on a specific subject
Business Web directory have main categories and are then broken into additional sub categories. In the category of directories you will find the subcategories for deep links, paid, niche, free and general. When you click on a subcategory you will then find a list of websites related to that subcategory.