The aim of this bachelor's paper is to explain and give an outline of the basics, emergence, development and theories of information science, from its very beginings to today. First, the broader social and cultural context in which information science emerged is studied, from the appearance of language to the modern age we live in, as well as the predecessors of information science in other disciplines dealing with collection, processing, storing, transmitting and dissemination of information. Secondly, a number of definitions of information sciences, their subject and area of study are dealt with. The next part compares information technologies to information sciences and explains how information technologies affected the development of information sciences mid-20th-century. Terms and phenomena important to information science are studied closely: information, its definitions and theories; knowledge; data; and relevance. After a systemic overview, the paper delves into the Croatian context; the emergence and development of information sciences in Croatia, as well as the founding of the studies and study programs. The most prominent figure studied is dr. Božo Težak, as a founder of information sciences, not only in Croatian (Yugoslavian at the time) level, but the world-wide one just as well. The end of the paper touches on the study of information and communication sciences at the Faculty of Humanities and Social Sciences at the University of Zagreb, its origin and the founder, professor Bulcsú László.