Theorysonic One is a series of software products, cloud computing, and online services by Theorysonic. It was launched on September 12, 1997, and replaces the old Theorysonic Application Suite and Theorysonic Communicator.




  • Cuckoo - web search.
  • One Account - single sign-on service.
  • One Business
  • One Cloud - file-hosting service running on TSUG, PTSUG, Windows, MacOS, Linux, Android, and iOS.
  • One Group
  • One Keychain
  • One Mail
  • One People
  • One Photo
  • One Planner
  • One Share
  • One Talk
  • TheoryOffice One


  • One Spaces
  • One TV
  • One Writer

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.