To be honest, I’m not a big fan of cross-referenced file
systems. Specifically, I’m not a fan of systems which require
you to keep a secondary index of things you’ve already filed.
Whether in a card system, a notebook or a computer file, the
more places you have to keep files organized, the more places
for things to get out of control. That being said, cross
referencing works for some people and certain fixed types of
cross references are easy for anybody to use. Also, the
development of tags as metadata for electronic data serves as a
type of cross reference. What is cross referencing? When
organizing documents or records you will have those which could
belong under more than one category or file name. To manage
this, file the records in one category and place a cross-
reference note in the other. It is important to be consistent in
deciding where to file records. Cross referencing can also
trigger the mind into remembering information. One of the most
common examples of a cross reference is the index of a bo