Multiple versions of a human being pressing the number keys on a calculator. Recorded with and mixed from a rode ntg-2 and a studioelectronics se2000 in a double mono setup.
Some typing on a standard desktop pc keyboard (but you may use it as the sound of a laptop keyboard too). Recorded with a dynamic mic and a directional, condenser mic in a small room, filtered and compressed to minimize noise.
So könnte es sich anhören, wenn jemand unerfahrenes auf einer computertastatur tippt und die gebrauchten tasten nicht findet. That's what it might sound like when someone inexperienced is typing on a computer keyboard and can't find the keys they need.