Kinesis Advantage QD (KB500USB/QD-Blk) Discontinued in 2016 and replaced with Advantage2 (KB600) and no longer being manufactured or offered for sale by Kinesis Compatible with most PC, Windows and Mac operating systems (NOT COMPATIBLE WITH WINDOWS 7) Advanced ergonomics PLUS on-board programmability Instant configuration for Windows, Mac and non-Windows PC operating environments, includes Windows and Mac legended keys. Design for Dvorak Typists with dual-legended Qwerty-Dvorak keycaps