"Co-workers" in the 1955 edition was changed to "coworkers" in Urantia Foundation's 1990 printing. This is one of about twenty-five such changes made in the tenth printing (with several more being made in the eleventh). The purpose of these alterations in hyphenation, spelling, or punctuation is not at all clear, as there is no modification in meaning, no improvement in phraseology, and no necessary spelling change involved with any of these edits. Although these changes, because of their insignificance, do not compromise the intentions of the authors, such trifling with the form of an author's expression seems wholly unwarranted.