Best keyboards you've used ever!

Maybe we should make a list of the various keyboard technologies : Mecahnical switches Metal contacts pressed together by key 'Snap action' domes or strips (e.g. HP35) Membranes pressed together when key is pressed Metal contacts held apart and allowed to touch when key is pressed (e.g. VT100) Microswitches Reed switches Hall Effect sensors Capacitance change devices Plastic flap over PCB (e.g. IBM PC) 'Keytronics' type Transformer coupling between PCB tracks -- moving core on the key (e.g. ICL Termiprinter) Pair of balanced transformers, one of which is damped by the key (e.g HP9810) Mecahnical encoding, parallel output mechanical contacts (e.g. ASR33) Mechanical encoding, serial output mechanical contact (e.g. Creed 7E) What have I missed (I think I have examples of all of those in use here!) -tony