This paper is based on the information gathered through a survey on industrial innovation in 24,000 Italian business units. Two-thirds of the business units surveyed declared they had introduced innovations, although there were significant variations across industries and size. Only 16 percent of the innovating business units monitored declared they had performed R&D: as many as 13,986 business units have introduced innovations without performing R&D. The paper focuses on the different sources of technical knowledge which support the innovative activities, such as R&D, design, acquisition of capital goods, patents, etc. It considers also the relationship between concentration and innovative intensity at the industry level. It emerges tha...