Abstract. Changes in the current economy are caused by changes in the technological field, especially in information and communication technologies. These changes cause a strong network of economic subjects. The network becomes the basic structure of relationships and brings some specifics to which it is necessary to respond if economic entities want to stay in the current business. Specific network effects can be observed for both physical networks and virtual networks of users of the same products. Individually rational technology decisions can lead to collectively inefficient results when network externalities exist. Game theory provides tools for coordination analysis. The paper presents models of technology coordination based on a coordination game. Arthur's basic model is presented and generalized to model with convertors and models with prices. Technology compatibility affects the selection of standards and social wellfare.