I currently have three at the moment: - The NIR (Neat, Interplanetary Ruffians) corporation who currently holds a monopoly on almost all space travel from and around Kerbin. NIR was the first to achieve space flight with their 'Pav7' space capsule and then landed on the Mun with 'NCL-1', a one-person lander. They're not very well liked since, y'know, they're a big corporation and apparently all big corporations are evil. Also, their PR department smells funny. - Then there's the Beta group. When NIR first landed on the Mun with NCL-1, the region it settled was known as Alpha Site. When they made a second attempt to land, this time with all that was needed to manufacture ships on the Mun, the landing area was known as Beta Site. The colony flourished and eventually declared independence as the Beta group. There's a lot of tension going on between Beta and NIR. - Lastly, there's Pavonis. The scientists who created the Pav7 capsule and its siblings eventually defected from NIR and started their own SSTO group, Pavonis. Despite their origin, they are in reasonably well standing with both NIR and Beta, and are using the resources of both organizations to create interplanetary ships that will be assembled and launched from the Mun. To further their goals, Pavonis is currently working on a series of SSTOs that will allow transit between Kerbin and the Mun, to ease the tension between NIR and Beta. So, pretty much, if it's launched from Kerbin, it's NIR. If it's launched from the Mun and intends to be around the Mun, it's Beta. If it's launched from the Mun and goes anywhere, it's Pavonis. Yay, roleplaying!