Website categorisation
Website categorisation is where websites are assigned to a limited number of categories by human, algorithms, or a combination of both. Third-party website categorisation lists provide the bulk of most of the sites blocked by "parental control" filters used by UK ISPs.
Providers
- Symantec RuleSpace (no longer in use?)
 - Symantec WebPulse (formerly Blue Coat)
 - McAfee TrustedSource
 - Zscaler
 - Forcepoint (formerly WebSense)
 - Fortinet FortiGuard