radio

Networks and call letters of stations are full caps, no periods or spaces:

            CBS

            radio station WGMS

            VOA (Voice of America)

Without call letters:

            American Broadcasting Company

            Public Broadcasting Service

The names of radio programs appear in italic without quotation marks:

             listening to A Prairie Home Companion

Capitalize radio when part of a formal name:

            Radio Free Europe/Radio Liberty

Lowercase when used descriptively after a name:

            Havana radio