PICS (Platform for Internet Content Selection). If you look in the
headers of web pages, you will see gobbledegook that looks
What these do is encode the content of each page, mainly so people can automatically
filter out materials they consider unsuited for their children.
ICRA (Internet Content Rating Association) (née RSAC (Recreational Software Advisory Council)
) manages the scheme. It is free to use. PICS
encoding is actually quite a bit more general than a glorified net nanny, but that is its
most common use. These are not obsolete and have been replaced by a single
labels.rdf file in the root.