This contribution examines the different concepts known as social informatics that have historically been separate. The paradigm that is preferred worldwide (based on Kling) is well described and often promoted, with a strong base both in the USA and Europe. This article, however, introduces lesser-known paradigms (based on Sokolov and later Ursul) that originated in the era of the USSR and have so far been employed chiefly in post-Soviet countries, including Russia. These paradigms have been neglected in English-written scientific literature, mainly because of the limited number of articles available in English. Other approaches are also introduced and related, which were historically named or classified as social informatics (American, British, Norwegian, Slovenian, German and Japanese). The present article introduces and further discusses the origin, historical development and basic methodological grounding of these approaches. All the approaches are then discussed and their differences as well as their similarities are pointed out. The aim is to create connections across the current generation of researchers, which includes the formation and conceptualization of different approaches and an exploration of possible areas for future cooperation.