My Operationing System is Windows 98. I would like to knows whats the differences between Windows 98 and UNIX, concerning performance, etc..

UNIX is an operating system which has an interactive time-sharing system UNIX became the first operating system written in the C language popular multi-user, multitasking operating system.This meant that it could installed on virtually any computer for which a C compiler existed. Windows is the only true multipurpose OS. It combines the performance of file and print servers and the power of Unix application servers with the ease of use of Windows. A single cross-platform API lets developers write code once and target many platforms. Users benefit from the easy-to-use Windows environment. Administrators [can] learn, use, and manage one system with powerful file and print services plus robust and reliable applications services. NT Server is interoperable with other systems such as NetWare; it integrates with legacy systems while offering a smooth migration. And NT Server supports up to 32 processors.

Don't forget the other benefits of NT. You are unable to shut off the GUI so that you consume resources needlessly. You benefit from not being able to script, or remotely admin the machine as well. You have the luxury of less stabiliy, scalabilty and in the case of Linux/BSD get to pay extra for a proprietary machine with closed source and delayed patches that purposley disable other machines. You benefit from a undocumented APIs and a lack of security. And even a little MS FUD.