EpicCV has some thoughtful tips for people developing their first resume. The first link discusses length; the second page discusses your "Work Experience" section. You'll find information on
- What to include, and what to omit
- Formatting tips
- Ways to make content appealing, readable, succinct
The abbreviation CV stands for "curriculum vitae," Latin for the facts about your life, qualifications, experience. It's basically the same as "resume"; the two terms can be used interchangeably, although CV is more frequently used in academic settings, and Resume in business settings.