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History of software - Wikipedia
Bill Gates - Wikipedia
Biography of Bill Gates, Co-Founder of Microsoft - ThoughtCo
Bill Gates | Biography, Microsoft, & Facts | Britannica Money
Software - Wikipedia
Who Invented Computer Software? - Tech Training HQ
Microsoft founded | April 4, 1975 - HISTORY
Fathers of Tech: 10 Men Who Invented & Innovated | BizTech …
Software & Languages | Timeline of Computer History - CHM
Software History Center - CHM