Magnetic RAM, Cross-Bar, Trapped Charge, Ferroelectric are all non-volatile memory technologies which I've heard of but, until yesterday, I hadn't heard of an antifuse-based NV memory.

Kilopass of Santa Clara has been beavering away for nine years using anti-fuse to make OTP memories which it sells as hard macros for embedding in ASIC/SOCs, eliminating the need for external serial flash and EEPROMs in mobile devices.

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