Over the years I have requested help on a Zues 4 I have here but only ran into a dead end street.It would error on boot. Today I booted it up and is came up? for some odd reason.. OSM Computer Corp.? Multi-User System.? 4.01/4.00? 01-19-1983? Muse 04.50 running I still can't find much on The OS. looks a little like MPM? Dir lists what looks like CPM/MPM type files. I do see PIP listed but would like to get a Back UP if possible.? Not sure how log the Drive will Keep working. Any manuals or the like out there on the OS? "muse" Or the computer Here is a Picture of one? http://computersheds.uk/fixed_pages/osm_zeus_4.html Thanks,? Jerry