"Google runs entirely on OO languages (C++, Java, Python)" There're some interesting questions about what makes a language an 'OO' language. For one, does a l

"Google runs entirely on OO languages (C++, Java, Python)" There're some interesting questions about what makes a language an 'OO' language. For one, does a language need only to provide facilities for OO, or must it enforce OO approaches? For another, what flavor of OO must it support or enforce? Most 'modern' languages will provide facilities that can be seen as supporting some form of OO; data structures are mandatory, and methods are an easy extension of them. However, most of these languages don't mandate an OO approach to coding; for instance, C++ (aka C/C++) doesn't and Python doesn't, although Java may be more dogmatic on the question. (A language that mandates OO approaches wouldn't be to my taste, because I don't believe those approaches to be appropriate for all problems.) So, it's a bit of a non-sequitur to proclaim that the virtues of OO are demonstrated by the use of 'OO languages'; unless those languages mandate OO approaches you'd need to look at how those languages are being used in practice.