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作業系統是您打開電腦或伺服器時首先開始的程式。所有其他應用程式依賴它來正常運行。一些流行的作業系統如Microsoft Windows，Mac OS和Linux。

Microsoft Mk MS Win Pro 2000 SP4 EN CD W32, 0.65 GB, 0.0625 GB, Intel Pentium - 133 MHz, Microsoft Windows 2000 Professional SP4

Microsoft Mk MS Win Pro 2000 SP4 EN CD W32. 最小硬碟機數量: 0.65 GB, 最低 RAM: 0.0625 GB. 處理器最低配置: Intel Pentium - 133 MHz, 相容操作系統: Microsoft Windows 2000 Professional SP4

Mk MS Win Pro 2000 SP4 EN CD W32

Microsoft Mk MS Win Pro 2000 SP4 EN CD W32