Article / Data warehouse cms software

[Nathan England]

I have a project to store a lot of data. Articles, stories, and 
encyclopedia type stuff. My first thought was to use a wiki (wikimedia) 
as it makes the contents easily searchable, but what about other cms 
systems like wordpress?

My question is, do any of you store lots of content which can be edited 
occasionally, searched often, and constantly has new stuff added? What 
do you use to store it in?

Another great benefit would be an easily backed up system, obviously a 
wordpress/db or wiki/db would be easily backed up. But I also need the 
ability to print in a basic format. And if I could access it and read on 
my phone it would be even better.

I appreciate your thoughts and input!

Nathan England