

Thus, for example, the first 50 matches that a Google search returns for the phrase "sports utility vehicle (SUV)," where the phrase appears in the course of a normal sentence (and not in, say, a title or subhead), include 38 instances of "sports utility vehicle (SUV)" and 12 instances of "Sports Utility Vehicle (SUV)."Ĭontrarily, the first 50 matches that a Google search returns for the phrase "interim final rule (IFR)," where the phrase appears in the course of a normal sentence, include 20 instances of "interim final rule (IFR)" and 30 instances of "Interim Final Rule (IFR)"-although in this case a few of the initial-capped matches may be parts of longer proper names, as in this sentence from the website Human Rights Watch: publishing-house practice, in my experience, but there are lots of instances where at least some publishers seem to be influenced by the capitalization of the initialism to initial-cap the spelled-out form as well. This is an accurate representation of standard U.S.

transmission-controlled protocol/Internet protocol (TCP/IP) On the other hand, if the words in a spelled-out version of an acronym or initialism are not derived from proper nouns or do not themselves constitute a proper noun (as in the official name of an organization), they should generally be lowercased, even when they appear alongside the abbreviated form.
#Headlines capitalization rules manual
The Chicago Manual of Style, sixteenth edition (2010) briefly addresses the question of whether the spelled-out form of an initialism or acronym should be initial-capped if the short form is capitalized, at 10.6 Capital versus lowercase for acronyms and initialisms:
