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Herman Hollerith, un inventor norteamericano construyó una máquina que utilizaba tarjetas perforadas y engranesUtilizaba tarjetas perforadas y engranesen. Se convirtio en el primer fabricante de computadoras en el mundo: IBM.
Plan projects on a visual timeline
Map milestones, phases, deadlines, and key events in one place so the sequence is easier to see and share. Timetoast is a timeline maker for work, school, research, and stories.