The Free On-line Dictionary of Computing (30 December 2018):

Comprehensive TeX Archive Network

    (CTAN) An archive site for the TeX text formatting
   package.

   (http://tex.ac.uk).  Gopher
   (gopher://gopher.tex.ac.uk/).  (ftp://ftp.tex.ac.uk/).
   NFS: nfs.tex.ac.uk.

   (1995-01-18)