Communications was a course taught at Starfleet Academy. The focus of this class was training cadets in communications.

In 2285, the course instructor was Captain M. Becker. The course and its instructor were listed on a directory placard located on the second level of a Starfleet Training Command building. (Star Trek II: The Wrath of Khan)

This course was only mentioned in writing.
The placard was sold on It's A Wrap! sale and auction for US$31.99. [1]