There are no substantive changes here, only very minor suggestions. If these notes don't help or come too late for your schedule, please feel free to ignore them. The first use could be linked to the Glossary, and their acronyms could be added there. Outside the Status section, UA first appears in 5.6, GUI in Guideline 1, UI in 10.3, and AT in Appendix 5. Those instances are not listed here.
Contractions are slightly colloquial for a formal specification.
A quote and suggestion then follow. 1.1 - Techniques par. 1 the window manger the window manager 2. 1.1 - Techniques par. Screen Readers Screen readers 2.