Defining OO as based on the use of class hierarchies and virtual functions is also practical in that it provides some guidance as to where OO is likely to be successful.

His thesis advisor in Cambridge was David Wheeler. Career
Stroustrup began developing C++ in 1978 (then called "C with Classes") and in his own words "invented C++ wrote its early definitions and produced its first implementation. Ellis & Bjarne Stroustrup – Addison-Wesley Pub Co; (1 January 1990); ISBN 0-201-51459-1.

Bjarne Stroustrup (Danish pronunciation: [ˈbjɑːnə ˈsdʁʌʊ̯ˀsdʁɔb]); born 30 December 1950 in Aarhus Denmark) is a Danish computer scientist most notable for the creation and the development of the widely-used C++ programming language. He is currently Professor and holder of the College of Engineering Chair in Computer Science at Texas A&M University.