auctex: Automatic Global
5.5.1 Automatic Customization for the Site
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Assuming that the automatic customization at the global level was done
when AUCTeX was installed, your choice is now: will you use it? If you
use it, you will benefit by having access to all the symbols and
environments available for completion purposes. The drawback is slower
load time when you edit a new file and perhaps too many confusing
symbols when you try to do a completion.
You can disable the automatic generated global style hooks by setting
the variable 'TeX-auto-global' to nil.
-- User Option: TeX-macro-global
Directories containing the site's TeX style files.
-- User Option: TeX-style-global
Directory containing hand generated TeX information.
These correspond to TeX macros shared by all users of a site.
-- User Option: TeX-auto-global
Directory containing automatically generated information.
For storing automatic extracted information about the TeX macros
shared by all users of a site.