Apple Type Services for Unicode Imaging

Apple Type Services for Unicode Imaging
DeveloperApple Computer
Operating systemClassic Mac OS, macOS
TypeSystem Utility
LicenseProprietary
Websitedeveloper.apple.com/
internationalization

The Apple Type Services for Unicode Imaging (ATSUI) is the set of services for rendering Unicode-encoded text introduced in Mac OS 8.5 and carried forward into Mac OS X.

It replaced the WorldScript engine for legacy encodings.