First Mechanical RecordingThomas Edison
He used Tin Foil with holes inprinted to create his Phonograph.
He recorded himself saying "Mary had a little lamb whose fleece was white as snow, and everywhere that Mary went the lamb would surely go."
First Flat DiscEmile Berliner created the First Flat Disc for the Gramophone.
In 1896 the idea was patented.
First Jazz RecordingThe Original Dixie Land Jass Band recorded their song Livery Stable Blues.
CD 5 inch diskSometimes abbreviated to CD-S
The first single to be available on this was Brothers in Arms by Dire Straits
Sony Mini DiskIt could store 74 minutes and, later, 80 minutes, of digitized audio.
12 inch 33Standard practise by Jamacian sound systems in 1956
Colombia bought it.