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These are organized by form and function.

Communications Computation Storage Authoring Simulation
Analog Mail Device Paper Typewriter Automaton
Electronic Network Calculator Tape Recorder Elektro
Digital Internet Computer
Hardware Modem Microprocessor Memory Peripheral Robot, XR
Software Service (Web) Program (OS) Database Application AI, World

These are types of media formats.

Multimedia (Video, Animation), Image (Object), Scent, Flavor, Audio (Text), Haptic, “Other


These are organized by a classification scheme developed exclusively for Cosma. More…



virtual world : computer-based simulated environment intended for its users to inhabit and interact via avatars (primarily software) — Webster See also OneLook, Free Dictionary, Wiktionary


Virtual world is an online community that takes the form of a computer-based simulated environment through which users can interact with one another and use and create objects. The term has become largely synonymous with interactive 3D virtual environments, where the users take the form of avatars visible to others. In general, virtual worlds allow for multiple users. The computer accesses a computer-simulated world and presents perceptual stimuli to the user, who in turn can manipulate elements of the modeled world and thus experience a degree of telepresence. Such modeled worlds and their rules may draw from the reality or fantasy worlds. Example rules are gravity, topography, locomotion, real-time actions, and communication. Communication between users can range from text, graphical icons, visual gesture, sound, and rarely, forms using touch, voice command, and balance senses. — Wikipedia

Encyclopædia Britannica



History of Virtual Worlds (MediaShift, PBS)
Virtual Worlds Timeline (Avatar Planet)
Virtual Worlds History (Wikipedia)


WorldCat, Library of Congress, UPenn Online Books, Open Library




OER Commons: Open Educational Resources


Hypergrid Business
NPR Archives







The Unlikely Story of Microsoft’s Surprise Minecraft Buyout (Daniel Goldberg and Linus Larsson, Wired)
Minecraft (Official Site), Minecraft (Wikipedia)


LEGO’s ‘Minecraft’ competitor is real and ready to download (Jon Fingas, Engadget)
LEGO Worlds Steam Early Access (
LEGO Worlds (


World of WarCraft (Official Site), World of Warcraft (Wikipedia)



Hypergrid Business Covering virtual reality, immersive worlds, and other emerging technologies

  • OpenSim land growth continues 11-month streak
    by David Kariuki on July 17, 2021 at 8:15 pm

    OpenSim’s public grids reported an increase in land area this month, continuing an 11-month growth streak. Total area increased by the equivalent of 2,252 standard regions, for a new record high of 103,625 regions. That’s nearly four times the area of Second Life, according to the latest stats from GridSurvey,

  • How to write a guest post for us
    by Maria Korolov on July 13, 2021 at 5:15 pm

    How to pitch a guest post us and not get immediately sent to the spam folder.

  • OSgrid birthday celebration starts July 19
    by David Kariuki on July 11, 2021 at 3:41 pm

    OSgrid, the largest grid in land area and active user numbers, will celebrate its 14th birthday starting on Monday, July 19. The celebration will run through July 25. And to celebrate its birthday, the grid will give away free parcels in the OSGB14 regions where creators can showcase their best

  • Interested in getting voice, new viewers for...
    by Maria Korolov on July 2, 2021 at 2:51 am

    The Infinite Metaverse Alliance called on OpenSim users to take a survey today. “Given the number of new features for users that have evolved in the past two years, we are interested in knowing more about what users want and need,” said CEO Lisa Laxton. The results will help the

  • Expert: AI in 2030 will be key to user...
    by Ehsan Foroughi on June 28, 2021 at 1:54 pm

    Today, artificial intelligence hardly has a unified definition or application. AI is listed as a capability across many technology products, but this is mostly a marketing tactic to capitalize on a feature perceived as a must-have. However, the biggest contributions of AI to our society have yet to be realized.