Protel-2 is the object-oriented version of Protel.

It is descended from an earlier object-oriented version of Pascal called Clascal, which was available on the Lisa computer.

Several object-oriented versions: Haskell++, and Mondrian.

Originally written in an extended (object-oriented) version of Pascal, it later appeared rewritten in C++.

QL query language is an object-oriented version of Datalog.

Enhancements will be made to Equation and other products this year, with development of an object-oriented version on the cards.

Interleaf is working on getting an object-oriented version out, and says the software already includes SGML object interchange functionality.

For example, an object-oriented version in C++ of the same program is below.

An object-oriented version of Haskell (programming language)

An object-oriented version, called Object CHILL, was developed also.