What is CLI

Digital documents tend to replace printed documents in many ways. For publishers it is cheaper to produce them and readers can get them instantly. However, the spectrum of “printed” material is quite big and so there is no way to have one kind of digital document that can satisfy all those involved in the publishing business (e.g., authors, readers, publishers, etc.). Digital document appeared in the 1960s and ever since they evolve. Sometimes this evolution process is slow and sometimes it's rapid, but the fact is that today there a plethora of digital document forms that can be used for many and different tasks and most of them are briefly documented here.