MillScript is a language intended for the batch production of websites. One of the most potentially useful missing features has been support for object oriented programming. Initial, very basic support for classes has just been checked into the CVS tree.
This basic support covers the definition of new classes, which may contain slots. Slots are very much like normal variables, but their values are contained within the class. The new classes have a default constructor automatically created for you. Documentation for the current implementation of classes may be found at:
http://www.millscript.org/reference/millscript/language/classes.html
Support for methods and user defined constructors will be added over the coming few weeks.