GitHub - ryanfb/mac-wasd-polytonic-greek: A Mac Polytonic Greek keyboard for WASD 104/87-Key US ANSI Layout
How to Get to Know the Greek Keyboard
How to Type in Greek; Combined Accents and Punctuation in Polytonic Greek
Amazon.com: Greek - English Non-Transparent Keyboard Decals Black, White OR Grey Background for Desktop, Laptop and Notebook (Black Background) : Electronics
OnScreenKeyboardU_S.png
Using a polytonic Greek Keyboard – NT Greek et al.