The claims made in these days on behalf of rival Filing Systems are apt to bewilder the man who has been accus tomed to use the more traditional methods of arranging and preserving business and other records. This work is an attempt to supply some trustworthy information as to the chief characteristics of modern methods, to explain the kind of assistance that they are capable of rendering to their users, and to show how they may be applied for various purposes. It is necessarily not exhaustive and it is not written in the interests of any one system. Its aim is to offer a few helpful' hints and suggestions to those who are contemplating the adoption of modern methods.