Differentiate between a Job an Occupation and a Carrier.

Jobs: A job is something you do to make money to live. It can be very different from what you want to do, but often provides a means to an end. For example, you might have a job delivering pizzas to help pay your expense while you are in school. Even after you graduate and are working in your chosen field, you may still need a second job. You might hear, or use, the phrase, "It's my job, but it's not what I do," because often the term "job" does not refer to what you enjoy doing.// 

Occupations: When people speak of their occupation, they are often referring to the field they work in. An occupation can be comprised of many different jobs.// 

Careers: Your career is comprised of the actions you typically take within a certain occupation. Often pictured as a staircase or ladder, your career begins with the lowest paying, most menial jobs and steps up with each job or action that increases your pay and responsibilities.