Cassette tape
When to crew chief gave Birddog a tape to play to keep him awake, it was a cassette tape. There were only reel to reel tapes during this time. Cassette weren't available during this time.
shareIncorrect , in 1962 Phillips invented the compact cassette (cassette tape) , it was introduced under the Norelco name in the US in 1964 . Philips also released the Norelco Carry-Corder 150 recorder/player in the U.S. in November 1964. By 1966 over 250,000 recorders had been sold in the US alone and Japan soon became the major source of recorders. By 1968, 85 manufacturers had sold over 2.4 million players .