http://www.natdat.com/crp/netsentry.htm

Net Sentry is the NEWEST and BEST browser available for the internet. It is
THE  safest browser designed for kids between the ages of 3 and up.  Net
Sentry will allow the parent to type in key words that act as blockers; any site
containing these words will not be accessed.  By default, Net Sentry blocks
sexual content of any type.  It takes only seconds to add other keywords to
block. Any parent or guardian with novice computer skills are able to run and
add keywords to the program.  If the child types in the URL of an undesirable
site, Net Sentry will not allow access if any words contained in the site exist on
the parents' list. Another feature of the program enables the parent to disable
programs or games while away. There's even a keyword filter to prevent your
child from entering information on a form on the web. Net Sentry operates
with both plus and minus modules via keywords and domain names. The
parent may have certain areas that they want to visit and may list them in the
program as "positive" sites. This program is a very effective tool in aiding
parents, grandparents or anyone with children that have access to a computer
and the internet.