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In Lesson 3 we will install a PCI Card wireless network adapter into our Livingroom computer. We show how to open different computer cases. We show how to indentify the PCI or PCI Express expansion slots and the procedure for installing the wireless network adapter into an open PCI expansion slot. Just like in Lesson 2 we show how to install the configuration software that comes with the adapter. We will get the computer connected to the router and on the Internet in Section 4.