The authors analyze the structuration of the software production and informatics services industries in Canada and the market for these products and services. The first part sketches a quantitative portrait of the industry in order to identify its main structural characteristics: predominance of small businesses, pronounced sectorial specialization, relatively high degree of concentration in each main sector. The second part focusses on the evolution of this industry in Canada from the mid-1960s to 1994. It is shown that this structuration occurred through successive waves of sector creation and industry leadership by different sectors during different periods. The final part examines the evolution of the informatics market in Canada and the demand for software and informatics services, and it reveals the importance of the public sector in the development of this kind of demand.