Similarly, in the '90s I had a second-hand Mac IIsi (with a second hard drive stuffed in place of the floppy) as a poor man's UNIX workstation. Later I worked m

Similarly, in the '90s I had a second-hand Mac IIsi (with a second hard drive stuffed in place of the floppy) as a poor man's UNIX workstation. Later I worked my way through various other second-hand workstations (VAX, MIPS, Alpha) all running NetBSD.