These cheap calculators certainly have history. I think it's even persistent. Chips with megabytes of non-volatile storage can be had for under a dollar at sca

These cheap calculators certainly have history. I think it's even persistent. Chips with megabytes of non-volatile storage can be had for under a dollar at scale these days. https://us.rs-online.com/product/microchip-technology-inc-/sst26vf032b-104i-sm/70518948/?srsltid=AfmBOooOzx50nEJlSEPCgDDF7Cu-PC0hfI8m08nnn80pkxS5C0ektgyejxw https://us.rs-online.com/product/microchip-technology-inc-/s... ... 4MB (32Mb) $0.74. The TI-84 EVO brags about having 3MB on their $160.00 device. Cool TI, don't strain yourself...