AOLserver is multithreaded, Tcl-enabled, and used for large scale, dynamic web sites.

[2] AOLserver was the first HTTP server program to combine multithreading, a built-in scripting language, and the pooling of persistent database connections.

For database-backed Web sites, this enabled performance improvements of 100× compared to the standard practices at the time of CGI scripts that opened fresh database connections on every page load.

AOLserver is a key component in the Open Architecture Community System (OpenACS) which is an advanced open-source toolkit for developing web applications.

In September 2007, a port of AOLserver for the iPhone was made available and later forked under the name "Joggame Server".