Membrane,  Conductive rubber etc..   FUJITSU  Model ; FKB 4725 Series  "Peerless" P/N;  N860-4725-T101 FCC ID: C9SKB4725 Switch: Fujitsu Peerless  system              Membrane + coil spring Curled cable with an AT/DIN plug Maxiswitch 　 Gateway2000  Maxi Touch OKI IF38410 FCC ID; N/A Switch; Membrane sheets and coiled spring Japanese  106 layout Coiled cable with a PS/2 plug