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Šoti matemaatik John Napier leiutas arvutuspulgad -
Sakslane Wilhem Schickhardt konstrueeris hammasratastega liitmisseadet. Tegelikkuses seda leiutist ei rakendatud.
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.