General Different Version Windows

How many different versions of Windows 2000 will there be?   

@sahinsalman876 | Updated 27 Jan. 2019

 A: There are four: Windows 2000 Professional is the workstation edition of Windows 2000. Windows 2000 Server/Advanced Server is the server edition of Windows 2000, which is designed to serve small- to mid-sized businesses and workgroups. Server supports up to 4GB of physical RAM and up to 4 processors per computer. Advanced Server supports up to 8GB of RAM and 8 processors per computer.