I use OS9, put out by Tandy for their upgrade machines. There is some talk about providing an Gui next year. So far though, it's still a command line environment. A new programming language is also provided on the latest version...Called Basic, it's a user friendly,easy to work with software. Though a bit revolutionary, the crisp For,Next loops and the ability to tie the machine up by the hour with IF,THEN, ELSEIF statements and can provide hours on end of computing pleasure for those adventureous individuals wanting to get their feet wet in a challanging programming effort.