Anyone who's been a student knows how hard it can be to scribble down everything someone else is saying. This problem is brilliantly solved by the Livescribe Pulse, a computerized pen that records as you write and digitally syncs the audio recording to the notes. Write or draw on specially patterned paper; then tap the pen on a word or sketch, and it will play back what was being said when you made those marks. The pen can also solve equations and define or translate words.

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