Playing with Soviet Era Ferrite Core Memory Planes - YouTube
Core Memory
Rare USSR Magnetic Ferrite Core Memory Plate BP-20 RAM 4096 bit 1978 SKU: 49 | eBay
Amazon.com: RAM-PRO 50-Piece Powerful Magnetic Full Round Ferrite Solid Magnet Discs (3/4" x 1/4") – Universal Use on Frigidaire's, Bulletin Boards & Arts-Crafts Projects, Etc. : Office Products