Book excerpt: "Source Code: My Beginnings" by Bill Gates

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In Bill Gates' new autobiography, "Source Code: My Beginnings" (published February 4 by Knopf), the computer pioneer and philanthropist writes of his formative years, and the experiences that led him to the then-burgeoning world of computers.

Read an excerpt below about how, in eighth grade, he discovered BASIC, which introduced him to the elegance and exacting demands of computer code; and don't miss Lee Cowan's interview with Bill Gates on "CBS Sunday Morning" February 2!