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Re:Of the biggies who uses Ruby? by mvp on Thursday August 30, 2012 @03:21AM (#4453448)
Rails is not Ruby.
Re:Of the biggies who uses Ruby? by byjazz on Tuesday September 04, 2012 @03:24AM (#4473531)
You got that wrong: ruby is not Rails, but Rails is ruby.

Meaning: any app using Rails is using ruby, so this list matches. OTOH, any app using ruby doesn't necessarily use Rails, so the other way around wouldn't work.

Working with Rails is a subset of what the OP was asking.