I was taught OOP using Modula-2 in 1989, by defining structures and functions that took a pointer to the struct as first parameter. No inheritance goodies! I used that style in C until 1996 when I definitely moved to C++. Probably why I am not terribly dismissive of OOP but very much of things like inheritance trees, the Java OOP style, and the overuse of GoF in architecture, literature and especially programming discussions.