In this episode Scott and I discuss "what you need to know" as a software developer. How many layers of abstraction do you need to understand? How many geek trading cards should you have in your collection? To find out more, we talked to 3 prominent, living-history developers: Ward Cunningham - creator of the Wiki and major figure in Agile/XP programming Charles Petzold - author of many books about Windows and prominent speaker Dan Bricklin - "Superman" according to Scott. Creator of the spreadsheet and all around amazing guy. Please consider subscribing with iTunes, or Zune. Or if you have a BitTorrent client and would like to help save us bandwidth money, as well as the bragging rights of downloading legal torrents via RSS, get our Torrent Feed at ClearBits. Most of the music in this podcast is released under Creative Commons, including: DJ Cary - Sonic Chiil Nine Inch Nails - Ghosts John Williams - Dusty Porch In addition - super short clips of the following songs were used under Fair Use: Kraftwerk - Pocket Calculator Laurie Anderson - O Superman Sponsorship The bandwidth and other costs for this week's show were picked up by Twilio: Need SMS or Voice call capabilities for your application? Check out Twilio. ... and Umbraco "Priceless CMS at the cost of virtually nothing"