Stupid CP/M question

<While I realize that it would not have been possible to make <their graphics part of the standard OS for a PDP-11, I <was led to believe that the PR0 350/380 had access to <their bit mapped screen displays. While doing such <manipulations was likely discouraged, is that a true POS did have a color and somewhat graphical display (menus on color screen) that was far from being graphics like most describe. Also the Graphical part was really not inherent to the basic OS, IE: no mouse or other object linking or support. The PRO350 also was contemporary to the PC XT making it a mid life PDP-11 based system. While -11s were used for graphics most of the serious work really required specialized hardware and programming support not generally available at the time. <Also, I understand that the first RT-11 was released about <1973. 1974 (late) and was based loosely on Tops10, RT-11 and OS/8 (DEC Command line styles). Before 1970! Dos for PC was 1981ish. TRSdos was '78ish, NS* dos was late '76. DOS used to be a generic as well for "disk operating system". Allison