Was Xerox PARC a consulting firm, a developer or a construction company?
They would act kind of like a developer here, but it's not to develop specific things, like commercial or residential space, it's probably a lot more open than that, which is why people are having trouble classifying it using traditional terms.
It's like trying to classify App Engine or AWS before cloud infrastructure became a thing, when everyone ran their own servers; it requires a new category all its own.