Who first used the word "object-oriented" to talk about programming systems?
W.R.T. programming, probably Alan Kay. Or at least someone at X-PARC
How is the development of C++ and Smalltalk similar? Different?
Similarities: both based on an OO paradigm
Differences:
C++: hack of C to introduce OO ideas in a procedural language. Emphasis wasn't on a pure OO language, but rather to take useful ideas from it and integrate it with the effiency and power of procedural.
Smalltalk: primarily a theoritical work, to explore the idea of OO programming.