Editorial style refers to the choices that writers and editors make to eliminate inconsistencies in their documents. These choices are sometimes difficult because language evolves. In updating this style guide, words related to new technologies posed a special challenge. Is it Email, E-mail, e-mail, or email? The U.S. Government Printing Office standard is e-mail, but this guidance clashes with a trend towards closing hyphenated words. The example shows that the authorities who compile style guides do not always agree. Moreover, each discipline has specific standards.