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The year is widely recognized as the time Johannes Gutenberg perfected the movable-type printing press in Germany.

: The press transitioned the primary medium of information from hand-written parchment to mass-produced paper. Technical Printing Specs (1440 DPI) 1440.jpg

: This invention allowed a single press to produce up to 3,600 pages per workday , compared to only a few pages possible by hand-copying. The year is widely recognized as the time

: A 2025 scoping review on the Pomodoro technique was published in BMC Medical Education , volume 25, article number 1440 . 600 pages per workday