The Long Now Blog: "mainframes have peculiarities that date back to punch card. The job that runs the program that handles and stores your financial transaction must be submitted using a maximum of 72 characters per line because that's the how many holes a punch card had."
Apple 1 For Sale | Applefritter Joe on August 14, 2004: "The cost of the Apple 1 system is Thirty thousand ($30,000) US dollars." Lorne000 on April 18, 2010: "I am interested in buying it and will pay as much as you want, since I'm more concerned if it's still available to purchase."