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SteamOS Beta 1.0 is released

As an ???early, first-look??? release, instead of an ISO installation image, you get either a 960 MB or a 2.4 GB zip file that you can use to build your own Steam Machine. Whether you are an experienced user or not, the instructions for building a DIY (do-it-yourself) Steam Machine are easy to follow. The zip file you download will involve a different set of instructions for building your Steam Machine.