.key
?Keynote Presentation
- :Keynote Presentation
- :Apple
- :
- :Pliki danych

MAC OS
Apple Keynote
.key
?Security Key
- :Security Key
- :N/A
- :
- :Pliki systemowe

MAC OS
Various programs that save registration information
.key
?Keyboard Definition File
- :Keyboard Definition File
- :N/A
- :
- :Pliki ustawień

MAC OS
Programs that support custom keyboard shortcuts