[2] They supported the use of DIBOL, a programming language combining features of BASIC, FORTRAN and COBOL.
[1] The Commercial Operating System was implemented to run on hardware from the PDP-8[4] and PDP-11 families.
A COS-310 system was purchased as a package which included a desk, VT52 VDT (Video Display Tube), and a pair of eight inch floppy drives.
[a][b] COS-350 was developed to support the PDP-11 port of DIBOL, and was the focus for some vendors of turnkey software packages.
[1] The much more powerful PDP-11/34 "added significant configuration flexibility and expansion capability.