My reply to you was to respond to your statement "The only success Linux has had is on Android" only, and I did also mention the success of Linux in servers market. I hope these figures would add up to your list of "Linux's successful stories". I might not be the best person to defend Linux's success in embedded world, but I could still tell from my years of experience on OEM embedded products manufacturing, Linux is very successful these years, but still not the most successful in term of adoptions and market peneration. The most successful OS of all in embedded world is definitely not Nokia's S40. What is your second guess? While you metioned RTOS, Symbian is as much a RTOS as WinCE. A Linux distro RTLinux has realtime turnaround time that these two could not compare; but still, they're fine for non-critical RT application area like mobile phone. Just little information for your thought. ^^ EDIT: to accurately quote and respond to exactly what you said in order to avoid misleading you in any way. ^^