Hey Guys,
I called support and checked the web and couldn't find an up-to-date and accurate list. Here are the categories available as of 1/24/18 below. Hope it helps someone! Also, curious what categories people find themselves configuring within their client's networks. Cheers!
Abortion
Abused Drugs
Adult and Pornography
Alcohol and Tobacco
Auctions
Bot Nets
Cheating (Academic)
Computer and Internet Info
Computer and Internet Security
Confirmed SPAM Sources
Content Delivery Networks
Cult and Occult
Dating
Dynamically Generated Content
Educational Institutions
Entertainment and Arts
Fashion and Beauty
Financial Services
Gambling
Games
Government
Gross
Hacking
Hate and Racism
Health and Medicine
Home and Garden
Hunting and Fishing
Illegal
Image and Video Search
Individual Stock Advice and Tools
Internet Communications
Internet Portals
Job Search
Keyloggers and Monitoring
Kids
Legal
Local Information
Malware Sites
Marijuana
Military
Motor Vehicles
Music
News and Media
Nudity
Online Greeting cards
Open HTTP Proxies
Parked Domains
Pay to Surf
Peer to Peer
Personal Storage
Personal sites and Blogs
Philosophy and Political Advocacy
Phishing and Other Frauds
Proxy Avoidance and Anonymizers
Questionable
Real Estate
Recreation and Hobbies
Reference and Research
Religion
SPAM URLs
Search Engines
Sex Education
Shareware and Freeware
Shopping
Social Networking
Society
Sports
Spyware and Adware
Streaming Media
Swimsuits & Intimate Apparel
Training and Tools
Translation
Travel
Unconfirmed SPAM Sources
Violence
Weapons
Web Advertisements
Web Hosting
Web based email