Horace Dediu on Apple reaching one billion iPhones sold:
The following is a list of the best-selling products across several categories:
Car model: VW Beetle 21.5 million
Car brand: Toyota Corolla 43 million
Music Album: Thriller 70 million
Vehicle: Honda Super Cub 87 million
Book Title: Lord of the Rings 150 million
Toy: Rubik’s Cube 350 million
Game console: Playstation 382 million
Book series: Harry Potter Series 450 million
Mobile Phone: iPhone 1 billion
The iPhone is not only the best selling mobile phone but also the best selling music player, the best selling camera, the best selling video screen and the best selling computer of all time.
It is, quite simply, the best selling product of all time.