Computer blocks would let you look up npc's,quests, item, planets you've explored, plants, animals,boss's and more they will also open door if you put the right code and trapdoor or active stone to and some more.hope you liked the idea feel free to post any ideas you have on this also sorry about any spelling errors and thank you for your time
This suggestion has already been made, in the form of a mobile version every character carries with them. Something similar is already shown in the screen shots. However, the part about using them to lock doors might be interesting.