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"Dave asked me if there was some way to bypass a bum sensor while waiting for the repairman to show up. But fixing Dave's sensor problem required fiddling around in the tractor's highly proprietary computer system—the tractor's engine control unit (tECU): the brains behind the agricultural beast. One hour later, I hopped back out of the cab of the tractor. Defeated. I was unable to breach the wall of proprietary defenses that protected the tECU like a fortress. I couldn't even connect to the computer. Because John Deere says I can't." Wiens also tells us about Farm Hack, a community that has sprung up to build a library of open source tools and knowledge for dealing with high-tech modification and repair in agriculture.
At the heart of the case is that Apple's use of DRM harmed customers by raising the price of the iPod and that Apple removed other competitor's music from the iPod — namely RealPlayer's Harmony music files. Apple does not dispute that it removed RealPlayer's files, but contends it was done for security reasons as RealPlayer was able to get the music files onto the iPod by posing as Apple FairPlay files. In testimony, Steve Jobs called RealPlayer's move "a hack" and there was considerable discussion at the time."