Here is the unit upside down as we were putting the bottom. We glued and screwed everything together. I used 1 inch pine for everything but the back and shelves. Since mine wasn't going to be against a wall, I wanted something nice on the back so bought a 3/8 inch piece of nice plywood even though I had the lumber for the back, DH thought it would make it too heavy.
The shelving is made out of a material generally used for backing of furniture bought in 4 X 8 " sheets. It has a finish on one side. Since my sides weren't 2 feet, it took a lot more cutting to make the shelves fit and since we aren't cabinet makers, some fit in spots others wouldn't. But they all slide well and I love it.
That was work! Unloading the binders (which I couldn't wait to do) and figuring out the categories...see the mess? It's much better now, trust me!
There, that's it. if you have any questions, feel free to email me.