My father used one of these systems in his office for the food research laboratory he worked at in the late 70''s. I remember the 8" floppy drives were separate from the processor. There was a big blue CRT/keyboard terminal of unknown make, and a big floor standing Texas Instruments dot matrix printer. I believe the system was serial connected to several pieces of lab equipment. I was only 7 or 8 at the time, and this whole thing fascinated me, it was the cat''s meow.

Used an Altos 8000 running UCSD p-system natively in my first job back in ''84. 48k ram, split over 4 users with some shared memory for semaphores etc.
Needed to use overlays in p-system to handle the larger programmes. Each overlay had to have the same procedure names in the smae location to work.
I remember with the 20MB version you needed to toggle the on/off switch a few time to get the drive up to speed before it would boot from it.

My dad had one for his business but it had two 8" floppies and no HHD. I suspect it was much cheaper to have a second floppy rather than a HHD. I was about 12 or 13 at the time.

I learned BASIC and COBOL on it and ran CP/M as the operating system.

I think the reason he bought it was because Peachtree Accounting ran on it (not 100$ sure about this, but over the years, he stuck with Peachtree and I think it was because of backwards ''compatibility''. Eventually the data was transferred from the Altos to a Windows machine of some sort, but remained PeachTree)