middle digit filing

n. A filing system that uses a tripartite number, using the middle part for the initial sort, the first part of the number for the second sort, and the third part for the final sort.


A file code 123-45-678 would be filed 45, 123, 678.


Robek, Brown, and Stephens 1996, p. 124 The important advantage of middle-digit filing in comparison to straight numeric filing is its almost perfect distribution of folders throughout the entire system. This makes it possible to place responsibility for accuracy in filing on the clerk assigned to a specific section. It also eliminates the queuing or congestion that occurs with straight numeric arrangements, which tend to concentrate file activity in the most recent or higher sequential order.