Archive computer dual Z80's running an early version of DBase with a 5MByte hard disk 1979. the owner actually set up a database for people to phone in and find where and who had particular items for sale. Unfortunately before it's time.
Had a Lisa 1983 was a magic machine with a 10 MByte hard drive SCSI, dual twiggy floppy drives and a daisy wheel printer to print graphics, multiple strikes of the period. Cost more than Gold but worth every penny. The Lisa was a revelation in the world of PC's. Also had a Wang word processor with dual 8" hard sectored floppies and an industrial strength daisy wheel printer. Not to mention all the rest, TRS 80, Apple I, Apple II, Apple GS (still going), Atari, Commodore 64 with colour screen, Tandy colour II 16KBytes,Tandy II, Tandy III, BBC, Macs, not to mention all the Olivetti's, Adler's, PDP's, the list just keeps getting longer.
In the 70's used to maintain a PDP-8/E at a mine site underground 3 monthly. So much grit and rubbish had to pull everything out of the case and high pressure water clean the boards and floppy drives, also had a 12" hard disk fully sealed 1 MByte I think, rinse with DM water and oven dry for 48 hours @ 60 deg C, before reassembly. Never failed to restart. A miracle. In service for 10 years before upgrade.