SIC 3149 covers infants' footwear
SIC 3149 covers athletic footwear makers
SIC 3149 covers boys' footwear makers
SIC 3663 covers makers of transceivers
SIC 3663 covers makers of transmitters
SIC 3663 covers makers of communication antennas
SIC 3663 covers makers of cellular radio telephones
SIC 3663 covers makers of fiber optics equipment
SIC 3663 covers makers of RF power amplifiers
SIC 3663 covers makers of satellite communications systems
SIC 3669 covers makers of railroad signaling devices
SIC 3669 covers makers of traffic control equipment
SIC 3663 covers makers of light communications equipment