The Internet industry is vast and encompasses various sectors and sub-sectors. Here’s a directory of major sectors within the Internet industry and their associated sub-sectors:

1. Web Services:

  • Search Engines: Google, Bing, Yahoo, etc.
  • Web Hosting: Services that host websites, e.g., Bluehost, GoDaddy.
  • Domain Registrars: Companies that provide domain registration, e.g., Namecheap.

2. Content Platforms:

  • Blogging Platforms: WordPress, Blogger, Medium.
  • Video Streaming: YouTube, Vimeo, Twitch.
  • Podcasting Platforms: Podbean, SoundCloud, Anchor.

3. E-Commerce:

  • Online Retailers: Amazon, eBay, Alibaba.
  • Auction Sites: eBay, Christie’s Online.
  • Marketplace Platforms: Etsy, Wish, Poshmark.

4. Social Media:

  • Social Networks: Facebook, LinkedIn, Twitter.
  • Photo Sharing: Instagram, Snapchat, Pinterest.
  • Discussion Forums: Reddit, Quora, Stack Exchange.

5. Cloud Computing:

  • Infrastructure as a Service (IaaS): Amazon Web Services, Google Cloud, Microsoft Azure.
  • Platform as a Service (PaaS): Heroku, Red Hat OpenShift.
  • Software as a Service (SaaS): Dropbox, Google Workspace, Microsoft 365.

6. Online Advertising:

  • Display Advertising Networks: Google Ads, Taboola, AdRoll.
  • Affiliate Marketing Networks: Amazon Associates, Commission Junction.
  • Pay-Per-Click Networks: Google Ads, Bing Ads.

7. Online Communication:

  • Email Providers: Gmail, Outlook, ProtonMail.
  • Instant Messaging: WhatsApp, Telegram, Messenger.
  • Video Conferencing: Zoom, Skype, Google Meet.

8. Online Gaming:

  • Gaming Platforms: Steam, Epic Games Store.
  • Multiplayer Online Games: World of Warcraft, Fortnite.
  • Casual Games: Miniclip, Kongregate.

9. FinTech and Online Payments:

  • Digital Wallets: PayPal, Apple Pay, Samsung Pay.
  • Cryptocurrency Platforms: Coinbase, Binance.
  • Peer-to-Peer Payments: Venmo, Cash App.

10. Online Education & Learning Platforms:

  • Massive Open Online Courses (MOOCs): Coursera, Udemy, edX.
  • E-learning Platforms: Khan Academy, Skillshare.
  • Online Certification: CompTIA, Cisco Certifications.

11. Online News & Publishing:

  • News Aggregators: Google News, Feedly.
  • Digital Newspapers & Magazines: The New York Times Digital, The Guardian Online.
  • E-books & Digital Libraries: Project Gutenberg, Amazon Kindle Store.

12. Streaming Services:

  • Music Streaming: Spotify, Apple Music, Amazon Music.
  • Video Streaming Platforms: Netflix, Hulu, Disney+.
  • Live Broadcasting: Twitch, YouTube Live.

This directory provides an outline of the primary sectors and sub-sectors within the Internet industry. It’s essential to note that this industry is continuously evolving, with new sectors and sub-sectors emerging regularly.