Heidenhain develops and manufactures linear encoders, angular encoders, rotary encoders, digital readouts, and numerical controls. Products are supplied to manufacturers of machine tools and manufacturers of automated facilities and machines, especially for semiconductor and electronics manufacturing. Heidenhain's competence in the area of linear and angular metrology is reflected by a large number of customised products. These include, in particular, measuring and inspection devices developed and built for many of the world's standards laboratories, as well as angle encoders for various telescope projects and satellite receiving antennas. The company is represented in 49 countries, mostly through wholly owned subsidiaries. Sales engineers and service technicians support users on-site with technical information and servicing in the local language. Heidenhain (GB) Ltd is a wholly owned subsidiary of Dr Johannes Heidenhain GmbH.