Computer programming and software design; Design and development of computer game software and virtual reality software; Design and development of computer hardware and software; Designing and developing computer game software and video game software for use with computers, video game program systems and computer networks; Designing and modifying computer programs and video games for others; File sharing services, namely, providing a website featuring technology enabling users to upload and download electronic files; Installation and maintenance of computer software; Maintenance and updating of computer software; Product testing; Research, development, design and upgrading of computer software; Services for maintenance of computer software; Updating and design of computer software; Updating and maintenance of computer software; Web site development for others