(The author) is German and is now considered one of the leading international scholars and specialists in information science. After being developed and transformed into the "Institute of Scientific Librarianship and Information" in 1966, the Institute of Librarianship at Humboldt University-Berlin organized a colloquium entitled "The Subject and Functions of Librarianship and Information Science - Documentation: The Relationships, Similarities, and Differences Between These Two Fields." Koblitze participated in this colloquium and wrote an extensive article on the topic, which was published in the "Central Journal for Librarianship" (Zentralblatt fur Bibliothekswesen-Leipzig Jahrgang 83. 1996, Heft 12 S.689-720). What you are reading here is the translation of this article. It should be noted that strong criticisms of the article's content have been written by other specialists. One such article, titled "On the Position of Librarianship," was written by Heinrich Roloff and published in another issue of the same journal. We hope to translate that critical article as well and make it available to our esteemed colleagues and other compatriots interested in this field of science.