Dear Rabbi. Thanks so much for answering all the various and interesting questions, quoting such great Halacha authorities. It is a great service for all. I wonder if it is correct or even best to learn directly from a movable computer tablet, since it is easier to carry than various large Sefarim. It also contains so many Perushim and options. Or is it better to learn from a printed Seffer?

Horav Shlomo Miller’s Shlit’a opinion is that it is better to learn from a printed Sefer when possible, since the printed letters contain Kedusha, and that is nor present on the writing on a computer screen. Horav Chanoch Ehrentreu Shlit’a added that if it will prevent one from learning, it is better to learn from a tablet which can be used when traveling on a bus etc.