It's a Chessbase CBH file, so it's probably useless for you. But you can find ECO online here: http://www.markalowery.net/Chess/ECO-List/ECO-list.html
ECO
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I went to the downloads section and downloaded ECO, but I can't figure out how to read the downloaded files. I don't have Fritz or any other chess program except for what came with my computer.