Comparison between Windows 7 vs Apple Mac OS X vs Ubuntu 11.04

Know which is best Operating System In Table Regarding Startup,Shutdown ,Reliability, User Interface ,VoIP applications ,Virus/Malware Effected Chances,Booting Time , Multimedia Multitasking,Gaming , Performance ,
Battery Life ,

	Windows 7	Apple Mac OS X	Ubuntu 11.04
Startup,Shutdown :	Slow	Fast	Very Fast
Reliability :	Moderate	More	More
User Interface :	More	Moderate	Moderate
VoIP applications :	More	Moderate	Moderate
Virus/Malware Effected Chances :	More	Less	Very Less
Booting Time :	Moderate	Less Time	Moderate
Multimedia Multitasking :	More	Moderate	Less
Gaming :	More	Less	Less
Performance :	More	Moderate	Moderate
Battery Life :	Moderate	More	More

Windows Platform based operating systems are widely used because of high user interference . well were as apple mac OS x is only works on apple platform .and cost of mac OS is much more than Windows . ubuntu is a free open source software .ubuntu is a Linux based operating system ,it wont effect by virus or Trojan. and usage of ubuntu and mac OS is similar because both are UNIX operated systems.