My last two letters sent via TinyLetter touch on many topics–from chess to the 1939 World’s Fair to transistors on a computer chip. But they actually go together quite well because they both are about the iPhone in one way or another.

How we make calls, how the phones stack up against old computers from the 90s.

I will confess that I’m biased, but I think they are both good balances between informative and interesting. Here’s the letter called “Long-Distance” and the second letter called “50x.”

Worth checking out for both the history and future of technology. And, of course, you could read them when they came out if you subscribe!