A new iMac will have Mac OS X 10.6 (known as Snow Leopard) installed. There have been a couple of updates to Snow Leopard and the current full number is 10.6.2. To check which version you have click on the Apple icon in the menu bar (left hand end), select About This Mac and check the Version number given. Select Software Update... from the Apple menu to see if any updates are available for your software.
A new iMac will come with the latest version of Mac OS X which is 10.6 (Snow Leopard). This, and all the other Apple software, can be updated to the current version by using Software Update found in the Apple menu (top left corner) which is currently 10.6.8. During July 2011 Apple will release Mac OS X 10.7 (Lion).
Internet Explorer comes preinstalled with all Windows Operating Systems. To upgrade it, you would go to Windows Update. If you have a 64 bit Operating System, you can not install a 32 bit version.
If you buy one today 7/2012 it will come with OSx Lion. Wait until late July 2012 and you will get OSX Mountain Lion.
Apple comes standard with the Snow Leopard (10.6), a 64 bit unix based operating system.
Java is distributed for different "platforms", where a platform is basically a processor / operating system combination. You need to know what operating system you are using, and download the corresponding Java version. I believe the Vaio comes with Microsoft Windows, so the only thing you need to figure out is whether you have the 64-bit version, or an older, 32-bit version. Then go to the Java site and download the corresponding version.
It comes free with any version of Windows operating system. PaintDOTnet is an improvement (it is a high school project that has become freeware and is quite OK)
You can upgrade OS 9 to 10.0 , 10.1, 10.2, 10.3, Maybe 10.4
Samsung Galaxy phones come with the Android operating system.
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Linux.
MacBook Pro comes with macOS, the most advanced desktop operating system in the world. macOS is designed to take full advantage of the powerful hardware in every Mac, and to deliver the most intuitive and seamless experience possible. You can buy MacBook Pro from: Microprokey
It's free. It comes preinstalled with any Windows OS.
Every laptop doesn't come preinstalled with Google Chrome. Windows laptops comes with Internet Explorer whereas Mac comes with Safari. Only laptops with Chrome OS called Chromebook have Google Chrome preinstalled.