@ChrisPirillo I assume that unit is a rotating magnetic memory of some kind. In 1973, I worked with the largest member of IBM's 370 line, a 370/168. The 4 megabytes of high-speed (80 ns) main memory that it had occupied a box about that size. Hahahaha.

Just 14 years later I had IBM's first 386-based desktop with 4 megs of RAM and roughly the same compute power as the 370/168 I had used long before.