Nobody answered you - ill take a stab at it -
i found typeO in a link
Describing N-O-P Staterooms on deck 3 as "Interior Stateroom: Two twin beds (can convert into queen-size), private bathroom, vanity, minibar, closed-circuit TV, radio and phone."
There is a map of the room from above showing two beds, a tv, sofa and a hallway to the door with closets on one side and the bath onthe other. The map is at
There is no guarentee type O on another ship is the same as on the Radiance. The interior stateroom on 7 and 8 is classed M but it looks like an O to me (same picture).