A set of definitions exists in the Senate ESEA bill written and voted out of the HELP Committee (Health, Education, Labor and Pensions).
Reps and sets are terms used by exercise professionals, athletes and individuals in the gym. They provide structure and organization to your workout. If you work with a personal trainer or physical therapist, she will prescribe an exercise based on a specific number of sets and reps.
Sales representatives, sometimes called sales reps or pharm reps, may be required to keep track of and analyze their sales statistics and submit reports at regular intervals. They may have to make their own appointments and plan their travel itinerary, as well as turning in their expenses to be reimbursed.