"PennMUSH is a freely available MUD-style server that provides a form of textual virtual reality. It maintains a persistent world database containing players, objects, rooms, exits, and programs. People connect to the server and take on characters in the virtual world, interacting with other players from around the (real) world. Common activities include game playing, role-playing, socializing, world-building, etc. These servers have also been used for education, research, and artistic endeavors."

"PennMUSH is a C-based MUD-like server, first released in 1992 and still actively maintained."

"M*U*S*H is an eclectic community of artists, experimenters, learners, and teachers. Here, players can create things that will move others intellectually or emotionally, explore uncharted territories in interactive text-based environments, and freely share knowledge and skills in a constructive and friendly setting. It's also where Javelin will beta-test new versions of PennMUSH, for what that's worth."

Modern Command simulates running a contemporary nation-state. You assume the role of a senior level official, and make decisions that effect the lives of millions of people in your country. Technology, social, political, military, and economic issues all reflect events in today's news. You will control and manipulate this world just like real life leaders do; you will issue orders, sway opinions, budget resources, provide a vision and structure for your apt minions to do their work. You will negotiate, order, ask, sign, give, take, listen and talk.