An electronic option that can be used in conjunction with printed media indexing is embedded indexing. In embedded indexing the actual index entries are embedded (or coded) into the pages where they occur. The benefits of this approach are two-fold. First, embedded indexes are easier to edit. In traditional book indexing if a change is made after the indexing process is completed that change can effect all the pages locators and can be time consuming and costly to correct. With embedded entries the page locators can be added after all changes are made and can be easily changed if there is a revised edition. Second, hyperlinks can be created to the embedded indexing codes. For example some computer books now ship with an electronic version of the book on a CD-ROM. The electronic version of the index can have hyperactive links to the embedded indexing entries. The disadvantages of embedded indexing are that it costs more and it is more difficult to show the range of a discussion. In general embedded indexes are useful for material that will likely be updated and republished and for materials that have an electronic version as a complement to the printed version. The technologies for making embedded indexes include use of several programs- Frame Maker, Quark, and Microsoft Word. J & J Indexing can provide embedded indexes in most of the common formats.