The document summarizes several older data storage technologies including magnetic tape, floppy disks, optical disks, and USB flash drives. It then discusses a new experimental atomic-scale magnetic memory that can store a bit using just 12 atoms, which is over 100 times denser than today's hard drives. The technology works by harnessing antiferromagnetism at the atomic scale. Potential applications include supercomputers, online databases, military databases, and satellites. However, issues remain around integrating the scanning tunneling microscope required to read and write bits as well as operating the memory above absolute zero.