The magazine Protoculture Addicts, the name indicating its origins as a Robotech fanzine.
Billboard magazine, the major trade publication of the music industry, was originally a trade paper for the billboard advertising industry. At least, that's what it was when it started. But the publication had shifted its focus to the entertainment industry (which, at the time, was a major user of billboard advertising) before the 19th century ended.
The Japanese video game magazine Weekly Famitsu (and its various spin-offs) got its current name from an abbreviation of its original name, Famicom Tsūshin (officially translated as the Famicom Journal). When the magazine began, the Family Computer or Famicom (the Japanese version of the Nintendo Entertainment System) was the dominant game console in Japan and its name was used synonymously with video games in general, much in the same way the name "Nintendo" was used with video games in America during the late 1980s and early 1990s. Weekly Famitsu has since become a multiplatform magazine with a spin-off publication (titled Famitsu DS+Wii) that covers Nintendo systems exclusively.
Enterbrain attempted to avoid using the "Famitsu" name when they started a PlayStation-centric spinoff magazine in 1996 called PlayStation Tsūshin. This idea fell through when they renamed the magazine Famitsu PS in 1999 and the magazine underwent a series of other renames throughout the years (Famitsu PS2, Famitsu PS+, Famitsu PSP+PS2) until ending publication in 2010.
GQ is short for "Gentleman's Quarterly". It's been issued monthly for quite some time.
Starting in 1999, Country Weekly was distributed fortnightly (once every two weeks). It finally reverted to a weekly in February 2009.
Although the Radio Times still offers comprehensive radio listings (near the back of the magazine), chances are that most readers are there for the TV listings, the interviews or the previews of coming shows. There may not be quite as many national radio stations as there are national TV stations, but there are now 10 pages of TV listings for every 2 pages of radio listings.
Similarly, in late 2008 and early 2009, TV Guide made a series of changes in its format, drastically reducing the amount of space given to actual TV listings (Cutting all but the grid-format listings first, then dropping several channels from the grids) and focusing more on celebrity-style reporting.
The magazine frequently posts disclaimers in its ads that it is not solely about economics or the economy, but a general news magazine. When founded in 1843, the title made a fair amount of sense, as it was indeed largely devoted to economic matters, and particular advocacy for the repeal of Britain's Corn Laws. By 1845, it has already broadened its scope considerably, and gained this full title: The Economist, Weekly Commercial Times, Bankers' Gazette, and Railway Monitor. A Political, Literary and General Newspaper. That title was eventually reduced to its more sensible but misleading original version.
In addition, the editors invariably refer to the magazine itself as a "newspaper", even though it hasn't been published in a broadsheet format since at least the early 20th century.
Australian Women's Weekly began as a weekly magazine in 1933. In 1982, it converted to a monthly frequency. The title stayed the same, both for reasons of familiarity and because the title Women's Monthly was deemed 'unseemly'.
The now-defunct British publication Marxism Today was originally the theoretical journal of the British Communist Party, and read the way you'd expect. During its last years when Martin Jacques was the editor, however, it devoted itself to a more generally leftist critique of Thatcherism and gained a wider audience. The joke from both sides of the political spectrum was that the only Marxism in it was the title.
Nintendo Power was half an example of this. Initially the second half of the title referred to the "power" it gave to Nintendo game players to beat the games they were playing, through included tips, strategies, and walkthroughs. Eventually it began to give up including tips and focused more on interviews and news, as anyone could just as easily look up a walkthrough or watch gameplay videos on YouTube.
Auto Trader (the British magazine) has three examples of this: the editions 'Southern' (which now includes Wales and South West England), Midland (now covering Anglia and the Home Counties, extending beyond the Midlands), and North London & East of England (which is really In Name Only now, as it's amalgamated its content with the Midland edition). Both editions only survive due to the Grandfather Clause. In any case, the magazine's Periphery Demographic didn't really care... it still remains popular.
Thanks to financial problems, Opera Monthly, the New York magazine from the publishers of TheaterWeek, published every other month during the parent company's final year or so of operation.