This chapter from The Chicago Manual of Style, 14th Edition is a brief guide for authors and professional indexers. It covers the nuts and bolts of preparing an index, from marking the page proofs to typing the index, as well as the general principles involved. It also addresses common indexing problems, such as subentries, punctuation, and confusing names. Along with the Manual, this chapter has been thoroughly revised with the addition of numerous examples and an updated discussion of computer usage.