Select Setup > Lists > Occupations.

To delete an occupation, select the occupation and then click Delete  You will be prompted to confirm this action.

To edit an occupation, select the occupation and then click the Edit button. The New Occupation window appears. Make your modification to the occupation and then click OK. to save the change.

To create a new occupation, click  The New Occupation window appears. Enter a new occupation and then click OK. to save it.