: This data is public and can be found via the U.S. Data Catalog , where it serves as a foundation for modern nautical charts. 3. Historical Technical Catalogs
In environmental science, represents a massive data set from a National Oceanic and Atmospheric Administration (NOAA) survey. 12691x
The term also surfaces in digitized archives of early 20th-century electrical equipment. Catalog No. 49 from the Madison Electric Co. uses similar numeric identifiers for everything from "multi-breakers" to "theatre dimmers," showcasing how industrial naming conventions have remained remarkably consistent over the last century. : This data is public and can be found via the U