URI
Notation
654
Caption
Telecommunication and telecontrol (organization, services)
Application Note
Details of telecommunications machinery by 62-1/-9
See also
338.4Production and services according to economic sectors
621.3Electrical engineering
623.6Field engineering equipment and operations. Lines of communication. Radar countermeasures. Military topography
656Transport and postal services. Traffic organization and control
Broader class
65  Communication and transport industries. Accountancy. Business management. Public relations
Narrower classes
654.1Telegraphy, telephony, radio, television services
654.9Signalling. Various telecommunication services. Remote control (telecontrol)