Let me continue here. Henry Spencer at least helped to popularize the idea (if not invented the phrase himself), that Space Shuttle wasn't reusable, but rather

Let me continue here. Henry Spencer at least helped to popularize the idea (if not invented the phrase himself), that Space Shuttle wasn't reusable, but rather refurbishable system. Both 1st stage boosters and 2nd stage engines had to go through detailed inspection and maintenance after each flight.