Who's Who was the creation of Len Wein, Marv Wolfman, and Robert Greenberger, and its first incarnation debuted in the last month of 1984 and ran 26 issues until 1987. It was essentially an encyclopedia in comic book form, listing the characters, places, and technology in the DC Universe. It began one month before the 12-issue limited seriesCrisis on Infinite Earths began; therefore, the earlier issues discuss Pre-Crisis versions of the characters, whereas issues released after the conclusion of the limited series discuss the Post-Crisis versions. For example, while both the Flash and Supergirl died during the Crisis, the Flash's death is not mentioned as issue #8 predates his death, but Supergirl's death is recounted 14 months later in issue #22. Also, characters such as Superman and Wonder Woman were rebooted during the series' run, so their entries recounted their Post-Crisis histories only, while their entire Silver Age histories were ignored. Who's Who was DC's answer to The Official Handbook of the Marvel Universe, which was published a few years earlier. The DC version had a less formal style than its Marvel counterpart. Each character had an individualized logo instead of a standard typeface; figures were shown in action poses rather than full-body portraits drawn by individual artists; character histories and power descriptions were more vague; and characters from all of DC's publishing domain were included, not just those from its shared universe. Various updated versions of the Who's Who have appeared over the years, including Who's Who Update '87 and Who's Who Update '88. Both books featured new entries, revised entries for characters in previous volumes, and an Appendix which included minor updates and corrections for previous entries. In 1989, most of the DC Annuals released that year included Who's Who entries. Many of these were revised versions of entries in the regularWho's Who series, but there were several new entries. DC Comics also put out two Who's Whospin-off series in the 1980s. The first was Who's Who in Star Trek, a two-issue series which profiled many of the people and places from the 1960s series, the 1970s and the 1980s Star Trek comic book published by DC. As the series was released prior to the premiere of , no information from that series was included. The second spin-off was Who's Who in the Legion of Super-Heroes, a seven-issue series which expanded on the Legion information included in the regular Who's Who and featured profiles on the various supporting characters, organizations, locations and villains which have appeared in Legion stories over the years. Some of the information contained in this book was Post-Crisis instead of Pre-Crisis. For example, the Superboy profile relates the Post-Crisis origin of the character as a creation of the Time Trapper, and there is no profile for Supergirl, despite her many adventures with the Legion, since by this time she was written out of continuity. In 1990, DC started over with a new Who's Who series titled Who's Who in the DC Universe. This book was not as comprehensive as the previous Who's Who, and some of the entries took on a less serious tone. One instance is an entry for Guy Gardner, which is written from the character's perspective. Another instance is a blank entry for Death, which has all the usual information headings crossed out and blue marker scrawl stating simply "Someday you'll meet her. You can find out for yourself." This series was followed up by Who's Who in the DC Universe Update 1993. DC also released a Who's Who series for their Impact Comics line. During the period from the late 1990s through the end of the 2000s, Who's Who was replaced with Secret Files and Origins, a series of one-shots devoted to particular characters or events in the DC Universe and which feature Who's Who-like profiles. DK Publishing has also released a number of Ultimate Guides, as well as a book titled The DC Comics Encyclopedia, which serve a similar purpose. On December 10, 2009, DC announced that a new Who's Who series would be published in 2010 as part of the company's 75th anniversary celebration. The series was later announced for 18 issues, 48 pages per issue, beginning in May 2010 with Bob Greenberger as sole writer and Bob Harras as editor. The series launch was subsequently delayed, but in October 2010 DC vice-president Dan DiDio stated that the series would be released after the 2011 DCU line-wide event, Flashpoint. However, the history of the DC Universe received an extensive overhaul in the aftermath of said Flashpoint event. The resulting New 52 comics are set in a greatly altered continuity, making a new edition of Who's Who seem unlikely in the short term because the histories of many characters are in a state of flux.
''Who's Who: The Definitive Directory of the DC Universe''
''Who's Who Update '87''
''Who's Who Update '88''
''Who's Who'' 1989 ''Annual''s
''Who's Who in Star Trek''
''Who's Who in the Legion of Super-Heroes''
''Who's Who in the DC Universe''
''Who's Who in the DC Universe Update 1993''
''Impact Comics Who's Who''
In other media
In the episode "Emperor Joker", during a battle between Batman and the Ten-Eyed Man, Bat-Mite was seen reading about the Ten-Eyed Man in issue #23 of the original Who's Who series.
