Pen and paper
The pen has been used as a note-taking tool for a long time. It has also been a key tool for learning for millennia. Recently, the use of the pen has begun to be underestimated as digital tools replace the writing feature of the pen.
We think it is premature to displace the pen. Studies show
( https://tinyurl.com/y6syxr47 ) that writing notes activates the brain in a unique way.
Precisely for learning reasons, the stylus is central to the Puro interface. Modern OCR (Optical Character Recognition) technology makes it easy to use stylus pens in everyday writing tasks.