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In addition, Apple created the open-source project Webkit, an HTML5 rendering engine that is also used in Google's Android OS, Palm, Nokia and others, according to Jobs.
"Almost every smartphone web browser other than Microsoft's uses WebKit. By making its WebKit technology open, Apple has set the standard for mobile web browsers," he wrote.
Jobs also countered Adobe's reported claims that Apple mobile devices can't access "full Web" because 75 percent of video on the Web is in flash.
"What they don't say is that almost all this video is also available in a more modern format, H.264, and viewable on iPhones, iPods and iPads. YouTube, with an estimated 40 percent of the web's video, shines in an app bundled on all Apple mobile devices," wrote Jobs.
Another Adobe claim, according to Jobs, is that Apple devices cannot play Flash games. This, he added, is true.
"Fortunately, there are over 50,000 games and entertainment titles on the App Store, and many of them are free. There are more games and entertainment titles available for iPhone, iPod and iPad than for any other platform in the world," he wrote.
Jobs also attacks Flash's reliability, security and performance, arguing that Symantec recently highlighted Flash for having one of the worst security records in 2009.
"We also know first hand that Flash is the number one reason Macs crash. We have been working with Adobe to fix these problems, but they have persisted for several years now. We don't want to reduce the reliability and security of our iPhones, iPods and iPads by adding Flash," Jobs wrote.
Next: Flash's Problems With Mobile Devices