Joe R. wrote:
     The thing that I remember about the B800 (or B80?)
was that it used an
 8" floppy drive. I'd never seen one before. Before that we used tapes to
 load all the SW and to IPL the Burroughs machines.   
Indeed, I worked on the development of the B80 and the 8 in floppy was
the system disk for some configurations. It held 1 M byte
  I remember the
 instructions for the B800 said that the floppy disk should be changed every
 40 hours! That's less than a standard work week! And I remember the disk
 weren't cheap in those days but thinking oh well, banks own them and they
 can certainly afford the costs. 
I suspect the 40 hour was working hours, so unless the disk was
permanently operational it should last considerably longer. I don't
recall any similar notices for the B80 floppy disks.
   -- HansP