There are several meta shapes for the design of computer stand, and they basically consists of two parts: an inclined plane for the computer, and the supporting structure. 

My initial idea is to not use the common sense supporting structure, and to leave the front center area empty, so that people can put keyboard and mouse inside. Also, I wanted this stand to be modular, so hopefully people can carry the stand with them in pieces and assemble it when needed. Because designing a stand with what I need will definitely involve structures extending in 3 directions.

At First, I proposed the structure to be significantly higher, however, in my case, it would be hard to support the weight of a laptop. Hence I shortened the height, and proposed several methods for the joint. 

I chose the hook joints, where it have a good performance on inter dimensional weight support. I initially also added a rod at the back, but found it useless eventually. From the third picture above, we could find that the keyboard can fit underneath the computer, in order to save some desk space.

Since we have to arrange the modules in a limited sized of plywood board, the design of the modules cannot run freely. This is how I arranged the several modules horizontally together.

In order to achieve the hook joint pattern on the CNC machine, we have to consider to drill which have a diameter of 6.5mm, hence that all the inner cuts should be a rounded path at the edges. Also, we have to leave the other side of the hook a half step cut, making a stepped area for the hook.

After I finished the 2D part of the design, it is easy to drag out the 3D module by extruding curves. One tricky thing here is that we have to use the move command to match the midpoints of two joints.  

Since designed hook joints on the board, I had multilayer CNC toolpath for cutting the outside, the insides and a half-step inside. 

I used the IMA Fab Lab CNC machine, and a 1.5mm thick plywood board for production. To use the CNC machine, we have to place the board onto the platform and map the origin point. Then, we have to mount the board to the platform, and cover the board with tapes to prevent ugly edges when cutting. 

For post production, I have to first use a smooth file to smooth out all the sharp edges and wooden spikes appeared during CNC. I specifically smoothened the corners a lot, as what a fillet curve would do. After that, I used sandpaper to further smooth the whole surface of the board.

I then smoothed and the joints with additional detailed file tool, because the first time I tried to assembly it stuck in the middle and made it hard to de-assembly. Since its portability is important for my design.