The company offers solutions and services across various industries, including advertising, apparel, automotive, construction, consumer goods, electronics, food, logistics, medicine, retail, and transportation. The company's core activity can be described as 'cross-industry solutions and services' as it covers a wide range of industries and offers various technologies and solutions to meet the needs of its customers. However, a more precise description of the core activity could be 'identification and tracking systems' as the company offers RFID technology (Radio Frequency Identification) used for identifying and tracking objects and individuals. This suggests that the company specializes in developing and providing solutions for identifying and tracking objects and individuals.