Soft Touch
Provided by the ASK Keyboard Dictionary
"Soft Touch" was an IBM marketing term for a keyboard that sported buckling spring (clicky) keyswitches that were greased from the factory to make them quieter than normal. The grease mitigated the spring's ping. This is in contrast to Quiet Touch keyboards, which use different keyswitch actuator designs to reduce noise. The only known Soft Touch keyboard is the Lexmark-made IBM Soft Touch Keyboard (P/N 8184692).