Before revision: It was based on the inventions of VLSI pioneers Carver Mead and Lynn Conway, who invented andtested this new approach to rapid-prototyping and short-run fabrication at Xerox PARC.
After revision: It was based on the revolutionary VLSI design methodology of Carver Mead and Lynn Conway, who pioneered and/or popularized the use of technology-independent design rules and modular cell-based, hierarchical system design, testing this new approach to rapid prototyping and short-run fabrication at Xerox PARC.