Vina Treeview for Content is a great module of Joomla 3. It's allows display Categories of component Content in a tree view, like a file explorer. This is useful for using Joomla Content as business directory or any listing type.
You can run multiple Vina Treeview for Content on a single page with much more options via module parameters.

Main Features:
- 3 module styles: Default, File Tree and Red Tree View.
- Powered by jQuery, so no more JS is required to be loaded.
- You can set the root category, you can turn on/off displaying items count for each category.
- You can select the number of category levels you want to render.
- Supports optional animation with variable speed.
- Controls can be added that collapses, expands, or toggles all nodes within a tree.
- Allow to change transitions speed, duration, and desired effect.
- Support Multi-Module on a page.
- To manipulate almost everything!
- Totally customizable and skinnable using HTML and CSS.
- Nice looking listing of Joomla Content categories demonstrates the categories hierarchy.
- Easy Joomla Content Categories navigation.
- W3C XHTML 1.0 Transitional. W3C CSS Valid.
- Tableless design and 100% CSS-based.
- Prevent the conflict between the module with other modules.
- Fully compatible IE7+, Firefox 2+, Flock 0.7+, Netscape, Safari, Opera 9.5

Download - Documentation

Greetings,
Never mind I figured it out....

Greetings,

Is there a way, or do you also offer, to make this display the alphabet so that the tree would be "A B C D E ... ect." and the articles would fall under their respective Title first character.

Thanks,
Bill

@Bill: do you want to group articles by alphabet when display in the tree?

Greetings,

My Client is a Medical Doctor and wants to be able to post his whitepapers for his patients. He would like for them to be alphabetically searchable. So instead of the tree listing the article title, he would like the tree to be the alphabet. For instance, when a User clicks on the letter "A", all articles beginning with the letter "A:" would be shown.

Make sense?? LOL

Thanks
Bill

@Bill: So it's easy! You just need create category: A, B, C and entry the doctors in right category with the first letter.