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Then came radio, records, tapes and CD's. But today's digital audio players are a quantum leap forward in. ... Millions have enjoyed recorded music since 1877 when Thomas Edison invented the phonograph. ... How do iPods work, the next two paragraphs really describe how all portable digital music players function.
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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.