The Machine is an object that appears in DHMIS 6 when Red Guy tries to save Yellow Guy from the teachers.
Every teacher is created inside the Machine by Roy (Notepad, Tony, Shrignold, Globe, Colin, Bread Loaf, Spinach Can, Steak Guy, Fridge, Lamp, Universe Guy, Saxophone, Stop Light, Football, Magnet and File), as when Red Guy tampers with it each teacher is formed by the glitching of the previous teacher (the exceptions being Bread Slice, Fridge, Notepad and Globe). It is also speculated that Duck Guy was created inside the Machine, and that Duck Guy was never real, as Duck Guy cameos in DHMIS 6 when he is formed, his only line in the episode being "Fish on my tray- WHAT?! WHERE AM I-I-I-I-I-I???" when he should've been dead.