It is amazing how far CAD software has advanced. I was the first person to use AutoCad on a portable computer. The first Compaq computer looked like a sewing machine with a flip down keyboard. You had to pay $1,000 for an optional 10 meg hard drive. I bought AutoCad version 1.1A and it would not run on the Compaq until the single tech at Autodesk and I worked out the bugs in the software to get it working. I would use it to design Surgery centers. When I went to the state department of health to get the state architects to review the plans, I would take them out to the parking lot to make the changes in the drawings and get sign off right away. Thats my story and I am sticking to it.