Abstract: A keyboard which has support frame, or several rows of key units. Each key is movable out of an initial inoperative position by the tip of the index finger. The key of each key unit of a guide key row has a key rod and a top face on one end of the key rod. The tip of a finger rests at random pressure on each top face as, at the opposite end of the key rod, a non-depressable mounting is articulatedly lodged in the support frame and prevents downward depression of the key while permitting tilting toward one or more operational positions.Each key unit of the guide key row has a magnetic pole to exercise a determined initial attraction on the top face-bearing end of the key rod an doppose tilting movement of the key away from the attracting means, when this movement is initiated by a finger tip.