What date did the Walkman come out?
It was first made in 1978 and went on sale on the 1st of July 1979.
There are no menu options that allow you to delete music from a Sony Walkman mp3. However, you can connect the player to a computer and delete songs individually. Open up Windows Media player and select the Sony Walkman device. A list of songs on the Walkman will come up, highlight the song you no longer want, and click on delete.