What device did Edwin Armstrong invent in 1933 that greatly improved radio sound quality?

What is the only month used in the NATO Phonetic Alphabet?

The first talking picture in Britain was called Blackmail. It was made in 1929, and was directed by which well-known director?

The British Union Jack can be found in the flag of which US state?

The first talking picture in Britain was called Blackmail. It was made in 1929, and was directed by which well-known director?

What radio drama anthology series, known for its twist endings, ran from 1974 to 1982 on CBS?

What form of radio broadcasting uses the internet to deliver audio content on demand?