I remember when I started University, in 1977, them proudly showing us around the computer room, which was a pretty large room housing one mainframe computer and various storage devices.
It had 128K of main memory, and a few exchangeable disc packs, each about 12" across, 7-8" deep, and capable of storing 300K of data. Even 15 years ago, when smartphones were in their infancy, an average one had way more processing power and memory than that did.
A friend described a visit to his university computer room in the same era. The room was largely empty, but with a couple of wardrobe sized pdp11 minicomputers in one corner. These had replaced the entire roomfull of earlier generation kit.