A personal wiki is a wiki maintained primarily for personal use. Personal wikis allow people to organize information on their desktop or mobile computing devices in a manner similar to community wikis. Personal wikis can be broadly divided into multi-user wikis with personal editions, and those wiki applications that are designed only for single users, not depending on a database engine and a web server. The first class includes many community wikis such as MoinMoin or TWiki, as these can be installed for standalone use as well. This may require installing additional software, for example a web server, a database management system, or a WAMP/LAMP software bundle. Nevertheless, this does not mean the wiki must be accessible to outside users.