Scratch requires only a very basic understanding of terms, and has been widely extended, as in translated to many languages and perhaps completely visual versions have been made.
Indeed. I recently got my own copy of "The TeXbook" after having had it on long loan from my university library many years. It's simply a joy to read and surely one of the best software manuals ever published.
Its somewhat easier in iOS 11, there's a more dedicated area in settings. Also, in iOS 11, it provides usernames and passwords within apps, which is super convenient.
Does anyone know of good ones for HCI papers?