A computer engineer. All engineering disciplines have acronyms. In the engineering quads, its typically assumed people are engineers, so its not always necessary to specify. Mech -mechanical engineer. Bio - bio engineer, EE - electrical engineer... etc.
Business student: "What's your major?"
Nerd: "I'm coen."
Business student: "What?"
Nerd: "umm, computer engineering"
Business student: "Oh, you'll be working for me one day."
Nerd: "yah, but i will still make more than you do."