When was the Boeing 747 first used for commerical service?

I worked for Pan Am in those days and flew on the inaugural flight of the 747 in 1971.

I'm surprised that no one has mentioned the fact that NASA used one to test the Space Shuttle during its development? The Shuttle sat on the back of the 747 whilst it took it to altitude before releasing it to fly on its own. It then glided to Earth as normal to touchdown.

Is still a strong favorite for most comfortable aircraft in service, among crews and passengers

Pimpao +,l had my first plane ride going to Vancouver in 1972 in that jumbo 747. they served a nice meal too. unlike the teeny bag of chips you get now!

Or Commerical?

Pimpao +,

contrary to the new aircraft