Get timely files from visualized structure of your working history

The presented KeyGraph for Files (KGF) helps a user to find timely files and their relationships to their major relevant files. KeyGraph, which was presented as a document indexing algorithm, is applied to a history of files accessed by the user, instead of to a document. This strategy of KGF is supported by analogies between a document and a history of one using files. The occurrences of words in a document and of files used in a sequence have common causal structures, and KeyGraph previously indexes documents taking advantage of the causal structure in a document. As an effect, timely files are obtained from the history of a user using files, in a similar manner to obtaining keywords from a document by KeyGraph