Who can properly explain the jobs that an MA in communication can do?(please see the details)

Who can properly explain the jobs that an MA in communication can do?(please see the details)?..?
It will be of more help if you can tell what someone with MA in communication with having the subfield as the once below can do: Thanks. 1-broadcasting and telecommunication regulation, policy and practice 2-communication, development and environment 3-computer mediated networks and virtual environments 4-publishing 5-inter-cultural communication 6-science and technology policy, technology-transfer, 7-media and cultural studies 8-acoustic environments and communication 9-management of technology 10-telework, telelearning, distance education *I would be much more thankful if you can give a brief explanation about each of these subfields.
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Use the Occupational Outlook Handbook, which is a government publication (US) and has all of this stuff and more. It should come up on the top of a google search using the book title.