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Basic Computer Operation Tutorial
Sound Blaster X4 - Hi-res 7.1 External USB DAC and Amp Sound Card with Super X-Fi® and SmartComms Kit for PC and Mac - Creative Labs (UK)
USB Audio External Sound Card, 6 Channel USB 5.1 Sound Card Recording External Sound Card Digital Optical SPDIF Audio Output Adapter, for PC/Laptop : Amazon.co.uk: Computers & Accessories