Using a polytonic Greek Keyboard – NT Greek et al.
TYPING ANCIENT (POLYTONIC) GREEK in an Apple operating system 1. Activate polytonic Greek
KB Covers GREEK-M-CB-2 Greek Keyboard Cover for MacBook/Air 13/Pro 2008+/Retina and Wireless - AVLGEAR.com
Greek Polytonic SA
typography - On the Windows polytonic Greek keyboard, what is the difference between the accent on q and the accent on semicolon? - Latin Language Stack Exchange
It is time to start typing your Greek texts | Greek Language Blog