i've had magnetic field, RF, magnets, etc all around different kinds of calculators and never seen this kind of reaction. It might would if you had a calculator that filled the entire room, like back in 1960 where you actually had individual magnets for each 1 and 0 stored by the computer, but now a days most things are able to take pretty strong magnetic fields without interference. Not to mention that but the magnet is permanently polarized meaning that it couldn't be magnetized for individual IO information. It will keep the same magnetic field unless you break it into pieces or put a huge freaking electromagnet next to it.