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Your application can use ATSUI to render Unicode-encoded text. ATSUI handles many aspects of text display for you, including advanced typography and line layout.

Apple Type Services for Unicode Imaging Reference This document describes the Apple Type Services for Unicode Imaging (ATSUI) programming interface and is updated for ATSUI 1.2. New features in ATSUI 1.2 include a linguistically based breakline and added tab character handling.