The Superman "S" shield.
|First appearance||Action Comics #1
|In story information|
|Element of stories featuring||Superman|
The Superman shield, also known as the Superman logo is the iconic emblem for the fictional DC Comics superhero Superman. As a representation of the first superhero, it served as a template for character design decades after Superman's first appearance. The tradition of wearing a representative symbol on the chest was mimicked by many subsequent superheroes, including Batman, Spider-Man, the Fantastic Four, Green Lantern, the Flash, Wonder Woman, Hawkman, and many others.
Evolution of the symbol 
In its original inception in Action Comics #1, Superman's symbol was a letter S with red and blue on a yellow police badge symbol that resembled a shield. The symbol was first changed a few issues later in Action Comics #7. The shield varied over the first few years of the comics, and many times was nothing more than an inverted triangle with an S inside of it.
The shield first became a diamond in the Fleischer cartoon serial Superman. It was black with a red S outlined with white (although it was on occasion, outlined with yellow). The S has varied in size and shape and the diamond shape containing it has also changed size and shape. Extreme examples of this would be the very large logo on the Dean Cain costume from the television series Lois & Clark: The New Adventures of Superman and the comparatively small version of the shield as depicted in the 2006 film Superman Returns. It has, in most incarnations, retained its original color, while changing shape here and there. The classic logo is the basis for virtually all other interpretations of the logo.
In the mid-1990s, when Superman's costume and powers changed briefly, during the "Superman Red/Superman Blue" comic book storylines, the shield changed colors and slightly changed shape, in accordance with the changes in the costume. In the miniseries Kingdom Come, an aged Superman sported an S-like symbol against a black background in a red pentagon.
In the 2000s TV series Smallville, the S symbol originally appeared as a pentagon with a vertical infinity symbol (to be similar to the S), in an attempt to make it seem more alien. However, beginning with the Season Six opening episode "Zod," Clark is given a crystal bearing the S logo in the style of the Superman Returns logo and is seen several times throughout the series and specifically in the season finale when a beam shaped like the logo hits a Phantom Zone escapee. The logo also appeared in the first episode of the series, when the students captured Clark by giving him a kryptonite necklace (which they didn't know was a weakness) and tied him to a cross-like beam in a cornfield and painted a red 'S' on Clark's chest (standing for Scarecrow, which was what he was meant to be as part of a high school hazing tradition) as a reference.
Initially, the S-shield had one meaning: S for Superman. One of the first alternative meanings was presented in Superman: The Movie, in which it was not an S, but rather the S-shaped Coat of arms of the House of El. After the Superman reboot story The Man of Steel, the symbol's story was that it was designed by Jonathan Kent and was derived from an ancient Native American symbol. The symbol was featured on a medicine blanket given to an ancestor of the Kent family by a Native American tribe after he helped to cure them of a plague and was supposed to represent a snake, an animal held to possess healing powers by the tribe (implying that, by wearing this symbol, Superman was a metaphorical healer). In 2004, Mark Waid's Superman: Birthright series says the S-Shield is the Kryptonian symbol for "hope" and Superman believes it may have begun as a coat of arms for the House of El. Later, writer Geoff Johns confirmed it was indeed a coat of arms, as well as a symbol for hope. In the 2013 film Man of Steel, when asked by Lois Lane what the "S" stands for, Superman states that it is not an "S", but rather the Kryptonian symbol for "hope". 
House of El 
Marv Wolfman's novelization of the film Superman Returns depicts the symbol as belonging to one of the three primary houses of Krypton that brought peace to the planet after a civil uprising, a serpent coiled inside a shield, a warning not to return to the ways of violence and deception. The shield has since been taken as a coat of arms, resulting in Jor-El's continued presence in the council despite his "mad" findings. The other two are merely described, including Pol-Us' eye of vigilance and Kol-Ar's open hand of truth and justice.
In almost all versions, Superman's red cape has an all-yellow version of the logo, with a thin black (in the comics) or red (in movies, matching the red color of the cape) line separating the areas. A notable exception is in the 2006 film Superman Returns, where there was no logo on the cape at all, having suddenly appeared on the belt buckle in reverse colors (yellow pentagon and S with red background pieces). The logo is also absent from Superman's cape in the 2013 film Man of Steel. The commonly cited reason for the symbol's absence in the movies was that because the cape was computer generated for most scenes, having the yellow symbol on the cape would have made computer animation too complicated. In the 2011 reboot of the comic book series, on his cape is a black pentagon and S with red background pieces.
During the Reign of the Supermen story arc, Each of the four different Supermen was represented by a variant of the symbol, which each wore on their person.
- The Last Son of Krypton (The Eradicator) wore a normal shield when he attempted to continue Superman's career. Later on, he wore a slightly altered, more curved version with an opening in the border and which was red and black instead of yellow and red.
- The Man of Tomorrow (The Cyborg)'s shield was half-normal on the right side, but the red darkened to an almost black color on the left half.
- Superboy wore an all-yellow symbol stitched into the back of his leather jacket, in addition to a normal one on his chest.
- The Man of Steel wore an all-metallic symbol.
- Black and red
- The modern Superboy wears a black and red variant of the symbol on his third costume. Lex Luthor hypothesized it is because that version of the symbol was everywhere following the death of Superman and his consequent first appearance.
- In Kingdom Come, Superman wears a black and red, simplified version following his return.
- After the Imperiex War, Superman wore the black and red variant to signify his mourning of the losses during the war.
- The Eradicator, for a time, wore a red and blacked, curvier version of the S-Shield.
- Bizarro's symbol is a reversed purple and yellow version.
- The inverted symbol, first seen in 52, means "resurrection" in Kryptonian.
- Jor-El sports a white symbol on his black clothing, as well as a black symbol on his white clothing in the 1978 Superman movie.
- In his modern appearances, Superman of Earth-2 wears a slightly different version of the symbol. Its most notable difference is an exaggerated serif on the 'S'.
- A variation of the symbol, designed as a stubbed red lightning bolt against a black shield has been used in several media, including an Elseworlds where Darkseid raised Kal-El, and was the basis of one of the final season of Superman: The Animated Series, and an episode named Brave New Metropolis from an alternate reality where Superman and Luthor took over Metropolis.
- A further variation, this time a white symbol against a red background, was used in episodes of Justice League and Justice League Unlimited, including an over the shoulder style cape and black costume. This version was a fascistic Superman and his Justice Lords who assassinated President Lex Luthor and then ruled the world with an iron fist after Luthor arranged the murder of The Flash.
- The symbol has been adapted to various flags in alternate realities, including the Nazi swastika (in JL-Axis) and Soviet Union hammer and sickle (Superman: Red Son).
- In the movie "Justice league New Frontier",The symbol on his chest has black background pieces, resembling the Golden Age version.
Wearers of the Shield 
Diamond and eight shield 
In the television series Smallville, an octagonal silver metallic key is used in the Kawatche caves, as well as in a transport device used to travel to the Fortress of Solitude. Along the edges are imprinted Kryptonian characters, one of which is the diamond border of the Superman shield with a figure 8 inside of the diamond instead of the S. The 8-shield is later described as being from an ancient form of the Kryptonian language, while the modern symbol is the familiar S-shield. The familiar S-shield is seen in Season 9 of Smallville. It is used as Clark Kent's calling card in his vigilante actions in Metropolis. Clark, calling himself the Blur, burns the sign using his heat vision in various places throughout the city. In an episode of Smallville, Clark mentions while talking to Oliver Queen that the mark "gives people hope."
- "Emblem History". Supermans-shop.com. Retrieved 2010-09-30.
- "S Photo History". Supermanhomepage.com. Retrieved 2010-09-30.
- Teen Titans Annual (vol. 3) #1
- Loeb, Jeph (w). Superman v2, 174 (August 2001), DC Comics
- Memorable quotes for "Smallville" Rabid (2009). Internet Movie Database. Retrieved March 18, 2011.
- Superman homepage
- Superman's Logo, Shield, Symbol and its History!
- Superman Logo
- Superman Shield Evolution with picture
- Superman costume for black and white film (brown, white, light blue)