Essay by Craig Robertson: “The filing cabinet was critical to the information infrastructure of the 20th-century. Like most infrastructure, it was usually overlooked….The subject of this essay emerged by chance. I was researching the history of the U.S. passport, and had spent weeks at the National Archives, struggling through thousands of reels of unindexed microfilm records of 19th-century diplomatic correspondence; then I arrived at the records for 1906. That year, the State Department adopted a numerical filing system. Suddenly, every American diplomatic office began using the same number for passport correspondence, with decimal numbers subdividing issues and cases. Rather than scrolling through microfilm images of bound pages organized chronologically, I could go straight to passport-relevant information that had been gathered in one place.
I soon discovered that I had Elihu Root to thank for making my research easier. A lawyer whose clients included Andrew Carnegie, Root became secretary of state in 1905. But not long after he arrived, the prominent corporate lawyer described himself as “a man trying to conduct the business of a large metropolitan law-firm in the office of a village squire.” The department’s record-keeping practices contributed to his frustration. As was then common in American offices, clerks used press books or copybooks to store incoming and outgoing correspondence in chronologically ordered bound volumes with limited indexing. For Root, the breaking point came when a request for a handful of letters resulted in several bulky volumes appearing on his desk. His response was swift: he demanded that a vertical filing system be adopted; soon the department was using a numerical subject-based filing system housed in filing cabinets.
The shift from bound volumes to filing systems is a milestone in the history of classification; the contemporaneous shift to vertical filing cabinets is a milestone in the history of storage….(More)”.