Ken Shirriff on Twitter: "The IBM 729 is the classic mainframe tape drive with its spinning reels. It stored the equivalent of thousands of punch cards on a spool of magnetic tape.
![Magnetic Tape Reel For Computer Data Storage Stock Photo, Picture And Royalty Free Image. Image 3183520. Magnetic Tape Reel For Computer Data Storage Stock Photo, Picture And Royalty Free Image. Image 3183520.](https://previews.123rf.com/images/claudiodivizia/claudiodivizia0806/claudiodivizia080600387/3183520-magnetic-tape-reel-for-computer-data-storage.jpg)
Magnetic Tape Reel For Computer Data Storage Stock Photo, Picture And Royalty Free Image. Image 3183520.
![No end in sight for magnetic tape storage as IBM and Sony squeeze 201 gigabits per square inch | TelecomTV No end in sight for magnetic tape storage as IBM and Sony squeeze 201 gigabits per square inch | TelecomTV](https://assets.telecomtv.com/assets/telecomtv/ibm-mainframe-4985.jpg?w=896&h=504&crop=auto)