Phonograph
Library of Congress History of the Cylinder Phonograph
Rutgers University Article on the Invention of the Phonograph
History of Music Players – numerous side links with dates
How Records and Phonographs Work
Brit Lab Video – How Do Vinyl Records Work
CNET – How Vinyl Records are Made
Cassettes
History Dumpster’s Blog on Cassettes
Video on Cassette History – Good information despite the delivery
Vintage RCA Documentary on 78 RPM Records
Second RCA Documentary on 33 1/3 RPM Records
8 Track Tapes
History of the 8 Track – Audio Engineering Society
8 Track Tapes Belong in a Museum – NPR Article
Reel to Reel
Timeline History of Reel to Reel Tapes
Video on History of Magnetic Tapes
CD
History of the CD – from Phillips, the folks who created the CD technology.
BBC Article – History of the CD
Disc Wizards’ History of the CD