HP 9015 Hardware Reference Manual page 8

POSReady 7 64-bit
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Windows 10 IoT Enterprise for Retail 64-bit
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Windows 10 Pro 64-bit
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Windows 10 Pro downgrade to Windows 7 Pro 32-bit
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Windows 10 Pro downgrade to Windows 7 Pro 64-bit
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Windows 10 Pro downgrade to Windows 8.1 Pro 64-bit
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Windows 7 Professional Edition 32-bit
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Windows 7 Professional Edition 64-bit
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Windows 8.1 Pro 64-bit
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One M.2 slot for optional WLAN
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Two USB 2.0 ports and two USB 3.0 ports
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One 24V powered USB port and three 12V powered USB ports, two powered serial ports, and one cash
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drawer port
Audio line-in and line-out ports
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One DisplayPort for secondary display
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One 2.5" internal storage bay for SATA HDD or SSD
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Two M.2 internal storage bays
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Cable management features
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ENERGY STAR compliant
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2 Chapter 1 Product overview