Tangible Media: Removable Storage of Image, Sound, Motion and Data
Tangible Media: Removable Storage of Image, Sound, Motion and Data
Tangible Media: Removable Storage of Image, Sound, Motion and Data
Coating
KarTrak

Date:

1967–1977

Material:

Reflective tape on steel

Company:

GTE/3M

Location:

Stamford, Connecticut/Maplewood, Minnesota, USA

Reflective barcode for rail cars that could be read automatically as the train moved past an optical sensor. GTE Sylvania developed the underlying technology and 3M provided the reflective tape.