I read, what was to me, quite an interesting blog post about different authors' contributing to different parts of the bible measured by analysing "linguistic fingerprints":
For millions of Jews and Christians, it’s a tenet of their faith that God is the author of the core text of the Hebrew Bible – the Torah, also known as the Pentateuch or the Five Books of Moses. But since the advent of modern biblical scholarship, academic researchers have believed the text was written by a number of different authors whose work could be identified by seemingly different ideological agendas and linguistic styles and the different names they used for God.[...]
The places in which the program disagreed with accepted scholarship might prove interesting leads for scholars. The first chapter of Genesis, for example, is usually thought to have been written by the “priestly” author, but the software indicated it was not.[...]
Similarly, the book of Isaiah is largely thought to have been written by two distinct authors, with the second author taking over after Chapter 39. The software’s results agreed that the book might have two authors, but suggested the second author’s section actually began six chapters earlier, in Chapter 33.
I asked a question more related to nature and operationalization of "linguistic fingerprint" on linguistics.SE. Here I would like to know, how many authors are thought to have been contributing to bible according to current state of knowledge. Where do these "old-school" and computer-based techniques of analysing overlap and where not? I assume it's more a graphological way of analysis in biblical hermeneutics. Is the term "linguistic fingerprint" used here at all?