Jack Mullin shipped back some of these things to the US from the Nazis.  
Jack Mullin shipped back some of these things to the US from the Nazis.  The first of these devices to use chromium dioxide was the Model 201 developed by Advent.  The Kansas City standard applied to these products.   Some of these things made by a company founded by Alexander Poniatoff were subject to "Sticky Shed Syndrome".  Poniatoff got funding from Bing Crosby, who liked that these products would allow him to spend more time on the golf course.  The (*) Ampex Model 200A used these things.  Devices like the Commodore 1530 used these things as cheaper storage than floppy disks.  Inexpensive ones are generally not very good at dealing with high frequencies.  In the 1980s, the British Phonograph Industry claimed home use of these things "Is Killing Music".  For 10 points, name these things which were played back by the original Sony Walkman.
Jack Mullin shipped back some of these things to the US from the Nazis.  
cassette tapes [or compact cassettes or audio cassettes or tape players]