What I think is interesting is in a lot of cases the older logos have the more 'flat' style which now is back in fashion and so looks futuristic/better.

Wow, I'm totally impressed. I thought for the longest time that there must have been some kind of design renaissance back in the 70s and 80s that produced all the logos I found iconic. Turns out it was all one guy.

Well, it was also Paul Rand.

Or graffiti artist Chuy Ramirez

The Bell System Logo is actually still being used by Verizon on payphones and hard hats (depending on region), it was used by Bell South until 2006, and currently all of the former RBOC's have the rights to use the logo, meaning SBC, CenturyLink and Verizon. Even the Saul Bass AT&T 'Deathstar' logo evolved subtly over time.

I'd also love to see a mention of Paul Rand too, he did the IBM, UPS, Westinghouse, NeXT, and ABC logos for example.

His sketches and the back-and-forth with Kubrick on The Shining's poster are pretty fascinating: http://www.thefoxisblack.com/2012/12/11/saul-bass-poster-ske...

I love the Girl Scouts logo. Very unique and clever.

At a glance I thought the redesign was supposed to be a group of trees. It wasn't until I looked at the original I realized what it was supposed to be.

The Quaker logo sure took a beating in its "revision."