PDi (Digital Interactive Slate(Blackboard) of great format): It(He,She) refers to the case in which the teacher or the presenter realizes the annotations from and on the projection surface.
PDiP (Digital Interactive Portable Slate(Blackboard)): In this case it is a question of doing the same thing to him(you,them) but from any place of the classroom or of the room. The projection surface can be a standard screen or the wall and the peripheral one from the one that manages the computer and from that the manuscript annotations are done it(he,she) is similar to a graphical tablet with electronic pencil.
Tablet Monitor: In this case the peripheral one from which there is realized the control of the computer and the manuscript annotations is a special monitor (combination of monitor and tablet)