The standard OS for a PC is Windows, and the latest version is Windows 7.
yes
The "latest" OS released by Microsoft is Windows Server 2008. The latest USER operating system is Vista.
Windows 7
Apple's Mac OS X can legally only be used on a computer made by Apple.
The latest trend in operating system is the ability to connect with most devices. These is what is known as compatibility of the operating system.
legally, only apple made computers, but there are "hackintoshes", pcs that use MAC OS X
Windows 7
PCs are way better then Macs but Macs are PCs so the question is meaningless. If the questioner wanted to compare PCs that run the Windows operating system and those that run Mac OS X the question remains meaningless as Macs can run Windows as well as Mac OS X if required.
Windows 8
Win 7
version 7
win 8