ftp.tex.ac.uk maintains a mirror of ftp.bluesky.com as a service for
users of the (commercial) Mac package Textures. The rest of the CTAN
mirrors us for this area of the archive.
It is not a complete mirror of the Bluesky ftp offerings -- we omit
their area 3rd.party.unsupported, most (if not all) of which is
represented elsewhere on CTAN.
We also provide a directory which originates here,
viz. systems/mac/textures/contrib, for Textures-related contributions,
demonstration software, etc.