Obol is an object-oriented language that was originally designed to introduce the conceptual foundations of object-oriented programming with minimal fuss. The Obol interpreter is written in Java, and Obol and Java objects can easily be used together in the same (Obol, or Java) application. The Obol installer can be found <a href="ftp://ftp.comlab.ox.ac.uk/pub/Packages/JAPE/OBOL/ObolInstall.jar”>here.