i686

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i686 may refer to the following:

• Intel P6 (microarchitecture), as first used in the Pentium Pro and later adapted into the Pentium M and Core architectures
• In open source and especially Linux computing, it refers to compiler optimization for Pentium Pro and all later Intel processors, and the Athlon and all later AMD processors, as compared to "i386" builds that are slower but more compatible with older processors

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