A CV differs from a resume in a few distinct ways. While a resume is always short, the CV is always long in form, extending to about two or three pages. It documents your entire career, detailing all of your collegiate education as well as your relevant work and volunteer experience. It should list any scholarly research you've completed, especially if you presented it at a conference or published it. It also covers any awards, honors and similar credentials. It is almost always accompanied by a cover letter, whereas this isn't always necessary for resumes.