If you have any interest in OpenType Variable Fonts and their TrueType GX origin, you must read Tom Rickner’s post: Part 1: from TrueType GX to Variable Fonts. Rickner was a member of the TrueType team at Apple in the late 1980’s, he and fellow team members Dave Opstad and Mike Reed were key engineers that drove TrueType GX font development.
Tom shares a lot of wonderful and fascinating development history. It’s so great that the font technology worked on back then is finally coming out of the wilderness and into the mainstream OpenType specification. A belated congratulations is due to all former TrueType GX font development team members.