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  Multithreaded environment
  
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  Timeouts, Sleep, Semaphores supported
  
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  lwIP Stack integrated
  
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  Debug console through Serial Port
  
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  OpenGL support through KGL-X addon (included)
  
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  Streaming mono channel sound support, wav or raw formats
  
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  Peripherals are accessed through an easy API or IOTCLs for raw usage

This is pretty much developer related, check out the DCOS web-site here. Thanks goes to Wayne for the e-mail and release.