1) Business 2) Line 3) Line of work 4) Occupation 
Work/Employment related learning.
Relating to an occupation for which a person has undergone special training or has special skills
[adj] - of or relation to a vocation or occupation
vocational, vocationally 1. Descriptive terms for a stated or regular occupation; a calling. 2. A reference to a call to, or fitness for, a certain career or job.
adjective of or relating to a vocation or occupation; especially providing or undergoing training in special skills; `vocational school`; `vocational students learning to repair a motor`
[Scientific terms] of or relating to an occupation