The answer is CAD, like in AutoCAD. But I am late, it was already claimed.
I would like to try the last door: 3.
Two more doors left, there is still few hours until they disappear.
New task ready to be solved down below. 2 more puzzles will be posted today.
Good luck and see you soon.
Helpful links:
#1firstpost,
Tournament rules,
RPG(game instruction),
Scoreboard New players are welcome!
⭕{4p}⭕
Daily micro-giveaway part I/III.YOBIT❖❖❖0523😊😊😊😊0564ABB6E15DOGEHint: 
At the beginning it was called Porsche901(82 cars where named this way)
however Peugeot was the patent owner for 3digit names with 0 in the middle...
so Porsche changed the name to...
Quartz controlled direct drive turntable revox😊
⭕Curse of subtrahit punctorum - random player gains 1 point