Кто знает в чем отличе одного windows сервера от другого?

Windows Svr Std 2003 R2a Win32 Russian 1pk DSP OEI CD 1-4CPU 5 Clt
Windows Server CAL 2003 English 1pk DSP OEI 5 Clt Device CAL
Windows Server CAL 2003 Russian 1pk DSP OEI 5 Clt Device CAL
Windows Server CAL 2003 English 1pk DSP OEI 5 Clt User CAL
Windows Server CAL 2003 Russian 1pk DSP OEI 5 Clt User CAL
Windows Server CAL 2003 English 1pk DSP OEI 1 Clt Device CAL
Windows Server CAL 2003 Russian 1pk DSP OEI 1 Clt Device CAL
Windows Server CAL 2003 English 1pk DSP OEI 1 Clt User CAL
Windows Server CAL 2003 Russian 1pk DSP OEI 1 Clt User CAL