Software for virtual worlds; virtual worlds contents operating software; game software for virtual worlds; interfaces for virtual worlds; virtual reality software; security tokens [encryption devices]; blockchain-based non-fungible tokens; computer software for issuing, trading, selling, managing, and verifying blockchain-based non-fungible tokens; computer software for automatic storage of trading data of blockchain-based non-fungible tokens; computer software for issuing, trading, selling, managing, and verifying blockchain-based ownership and license of digital contents; software for non-fungible tokens; downloadable image files; downloadable image files featuring non-fungible tokens; downloadable image files featuring character images for virtual worlds; recorded data files; recorded data files featuring meta data containing information on digital assets; downloadable digital video recordings; downloadable digital photographs; software relating to avatar; downloadable computer graphics; downloadable graphics for mobile phones; downloadable image files featuring avatars for virtual worlds; downloadable image files featuring virtual merchandise such as clothing, shoes, bags, headgear, eyewear, sports equipment, works of art, paintings, toys, etc. for virtual worlds; downloadable image files featuring virtual cars for virtual worlds; downloadable virtual goods, namely, computer programs for use online and in online virtual worlds; software; computer software for encryption; software for searching and retrieving information across a computer network; computer software for wireless content delivery; computer software for personal information management; computer software for processing digital images; downloadable e-wallets