![Amazon.com: RAM-PRO 25-Piece Powerful Magnetic Round Ferrite Magnet Discs with ¼” Dia. Holes (3/4" x 1/4") – Universal Use on Frigidaire's, Bulletin Boards & Arts-Crafts Projects, Etc. : Industrial & Scientific Amazon.com: RAM-PRO 25-Piece Powerful Magnetic Round Ferrite Magnet Discs with ¼” Dia. Holes (3/4" x 1/4") – Universal Use on Frigidaire's, Bulletin Boards & Arts-Crafts Projects, Etc. : Industrial & Scientific](https://m.media-amazon.com/images/I/81hQ1zq3JWL._AC_UF894,1000_QL80_.jpg)
Amazon.com: RAM-PRO 25-Piece Powerful Magnetic Round Ferrite Magnet Discs with ¼” Dia. Holes (3/4" x 1/4") – Universal Use on Frigidaire's, Bulletin Boards & Arts-Crafts Projects, Etc. : Industrial & Scientific
![Siliconinsider on Twitter: "Spotted at the @homecompmuseum, probably the largest ferrite cores I've seen in a ferrite core memory. A whole 144 bit! https://t.co/WNBLW6zbYf" / Twitter Siliconinsider on Twitter: "Spotted at the @homecompmuseum, probably the largest ferrite cores I've seen in a ferrite core memory. A whole 144 bit! https://t.co/WNBLW6zbYf" / Twitter](https://pbs.twimg.com/media/FnWCuPEWIBE5gFx.jpg)
Siliconinsider on Twitter: "Spotted at the @homecompmuseum, probably the largest ferrite cores I've seen in a ferrite core memory. A whole 144 bit! https://t.co/WNBLW6zbYf" / Twitter
![Mic-UK: A macro exploration of a 1960's supercomputer ferrite memory core and processor module. The CDC 6600 designed by Seymour Cray. Mic-UK: A macro exploration of a 1960's supercomputer ferrite memory core and processor module. The CDC 6600 designed by Seymour Cray.](http://www.microscopy-uk.org.uk/mag/imgmay21/dwIMGcore.jpg)
Mic-UK: A macro exploration of a 1960's supercomputer ferrite memory core and processor module. The CDC 6600 designed by Seymour Cray.
![What sort of a ferrite core will I need to make core memory? - Electrical Engineering Stack Exchange What sort of a ferrite core will I need to make core memory? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/BPaLB.jpg)