What works are you thinking of? When I think of Heinlein in that period, I remember a protagonist talking with a trucker about the truck's antigrav propulsion, then whipping out a slip-stick to figure out how far down it would be pushed under load. (Citizen of the Galaxy, I think.)
Stranger in a Strange Land had some "news nets" or somesuch that seemed pretty close to me. That's sixty-one. I poked through though, and everything that I was thinking of specifically turned out to be much later.
