Table Data Industrial Production: Total Index St Louis Fed
Early file management systems for industrial automation were designed to allow programmers to create, store, update and read files. In the earliest attempt to abstract the programs from the underlying physical data structures, indexed files were introduced to provide access to data via indexed keys. In early file management systems, a typical historic log file would be indexed by tag name, and data could be retrieved provided the tag name is known. Indexed files still had the limitations of...
