CADD stands for "Computer-Aided Drafting and Design". It is a college degree which provides career development in the use of computers to create and analyze designs. For Chris, however, this degree has provided no real-world benefits whatsoever, other than giving him something else to brag about to boyfriend-free girls.
Chris's CADD degree
Chris graduated from Piedmont Virginia Community College with an Associate in Applied Science degree and a CADD certificate. Chris states in his call to Kacey's father that he entered into the CADD program without knowing what kind of jobs such a certificate could get him. Throughout his years at PVCC, and in the years since graduating, he still hasn't bothered to figure it out. If Bob were still among us and Barbara still cared about anything, they'd be kicking themselves for wasting money on his tuition.
CADD at PVCC was designed as a two-year degree, but it took Chris five years to complete it, not including the year in which he was suspended from college. The CADD certificate itself only required four courses, or one semester of work. The remaining credit requirements were to be met with major-related requirements and a few general education classes. Chris would have needed extensive consultation with his advisor in the CADD program. In addition to this advising, Chris had at his disposal two CADD labs, a Career Services department, web-posted job openings, and links to relevant external sites. None of this could overcome Chris's general apathy and confusion about entering the world of work.
Even though it took Chris a long time to obtain this degree, of the years spent pursuing it, he only produced two pieces of work. While one might assume they were two big projects over a long amount of time, the two pieces of work he produced were a map of his mall and an incredibly large 3D Mayor's Office about the size of a football field with nothing much inside it. Chris claims that he received an A+ for these projects which took him "weeks to months" to complete. However, he has also admitted indirectly that one of his CADD professors, Dr. Kene C.U. Meniru, gave him a failing grade at some point. Typically, Chris could only assume that this criticism was completely unjustified, and that Dr. Meniru was entirely malicious.
Usage in the comics
Chris's CADD degrees apparently come into use within his comics. He even alludes to them assisting him at many points in his comic; for example, Sonichu & Rosechu's benefit house. However, the few basic measuring skills he may have picked up from his CADD courses are made even more pitiful by the fact that he never uses a ruler, nor are his drawings to scale. Heck, he doesn't use a computer for anything but the text, defeating the purpose of even learning CADD courses in the first place. Then again, it shouldn't require a fucking college course to be able to make basic measurements or draw things relatively proportionate to each other. Looking at his current art, he'd probably have been better off spending Bob's tuition money on Lego blocks.
Chris petulantly inserted Dr. Meniru into the comic as a villain by the name of CADD Chef, who mocks Chris's designs for his mall. This "injustice" guaranteed CADD Chef a place in the Private Villa of Corrupted Citizens as one of Mary Lee Walsh's minions.