Apple Advanced Typography (
AAT) is
Apple Inc.'s computer software for advanced
font rendering, supporting
internationalization and complex features for
typographers, a successor to Apple's little-used
QuickDraw GX font technology of the mid-1990s. It is a set of extensions to the
TrueType outline font standard, with smartfont features similar to the
OpenType font format that was developed by Adobe and Microsoft, and the open source
Graphite. It also incorporates concepts from Adobe's "
multiple master" font format, allowing for axes of traits to be defined and morphing of a glyph independently along each of these axes. AAT font features do not alter the underlying typed text; they only affect the characters' representation during glyph conversion.