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Google has had several logos since its renaming from "BackRub". The current official Google pop logo was designed by Ruth Kedar, and is a wordmark based on the Catull typeface. The company also includes various modifications and/or humorous features, such as cartoon modifications, of their logo for use on holidays, birthdays of famous people, and major events, such as the Olympics. These special logos, some designed by Dennis Hwang, have become known as Google Doodles. As of 14 January 2010[ref], Google's own gallery featured 712 logos.
History of the Google logo
In 1998 Sergey Brin created a computerized version of the Google letters using the free graphics program GIMP after learning how to use it. The exclamation mark was added, mimicking the Yahoo! logo. “There were a lot of different color iterations,” says Ruth Kedar, the graphic designer who developed the now-famous logo. “We ended up with the primary colors, but instead of having the pattern go in order, we put a secondary color on the L, which brought back the idea that Google doesn’t follow the rules.” 
The first Google Doodle was to the Burning Man Festival of 1998. The doodle was designed by Larry Page and Sergey Brin to notify users of their absence in case the servers crashed. Subsequent Google Doodles were designed by an outside contractor, until Larry and Sergey asked then-intern Dennis Hwang to design a logo for Bastille Day in 2000. Hwang has been designing the Google Doodles ever since. Clicking on a Google Doodle links to a string of Google search results about the topic, which can drive a lot of traffic to unsuspecting sites.
Google doodles have been produced for the birthdays of several noted artists and scientists, including Andy Warhol, Albert Einstein, Leonardo da Vinci, Rabindranath Tagore, Louis Braille, Percival Lowell, Edvard Munch, Nikola Tesla, Béla Bartók, René Magritte, Michael Jackson, H. G. Wells, Samuel Morse, Hans Christian Ørsted and Mohandas Gandhi among others. Additionally, the featuring of Lowell's logo design coincided with the launch of another Google product, Google Maps. Google doodles are also used to depict major events at Google, such as the company's own anniversary. British novelist Roald Dahl has been featured, with the logo containing characters and items from some of his books, such as Matilda. The celebration of historical events is another common topic of Google Doodles including a Lego brick design in celebration of the interlocking Lego block's 50th anniversary. The anniversary of H. G. Wells' War of the Worlds has also been celebrated. On February 14, 2007, Valentine's Day, the Google doodle featured a chocolate-dipped strawberry that combined the second "g" and the "l" as its green stem. This design gave the appearance that the "l" was missing, thereby displaying "Googe". In response to several speculations the Official Google Blog, responded: "When you look at the logo, you may worry that we forgot our name overnight, skipped a letter, or have decided that 'Googe' has a better ring to it. None of the above. I just know that those with true romance and poetry in their soul will see the subtlety immediately. And if you're feeling grouchy today, may I suggest eating a strawberry." For the celebration of Earth Hour, the white background was transformed black to symbolize "the turning off of lights".
Google was criticized in 2007 for not featuring versions of the Google logo for American patriotic holidays such as Memorial Day and Veterans Day. That year, Google featured a logo commemorating Veterans Day.
Google unveiled a steady stream of Doodles in 2009, including one with Mahatma Gandhi's face on October 2, 2009, the birthday of Mahatma Gandhi, which is observed by the UN as the International Day for Non-Violence.
On October 31, 2009, the Google page displayed a 4-step Halloween logo, showing a more and more chaotic display of sweets after the first 3 clicks, before redirecting the user to the search results page.
During the week of November 2, 2009, Google featured a new picture of Sesame Street characters to celebrate the show's 40th anniversary.
On Friday, November 13, 2009, Google featured the moon as the second "o" in Google with the other letters appearing as water, to celebrate NASA's confirmation of significant amounts of water on the moon.
Google holds a Doodle4Google competition for students in grades K–12 to create their own Google doodle. Winning doodles go onto the Doodle4Google website, where the public can vote for the winner, who wins a trip to the Googleplex and the hosting of the winning doodle for 24 hours on the Google website. The competition originated in the United Kingdom, and now also exists in the United States. The competition was also held in Ireland in 2008.. Google announced Doodle4Google competition for India in 2009 and the winning doodle was displayed on the Google India homepage on November 14th.
Google's favicon is a version of the lowercase "g" from its official logo, introduced in 2008, and originally intended to be a part of a larger set of icons developed for better scalability on mobile devices. The current version includes background colors red, green, blue and yellow.. In June 2008, Google launched a contest intended to receive favicon submissions, and a design made by André Resende, a computer science undergraduate student at the University of Campinas in Brazil, formed the basis of the new design. From Official Google Blog: "His placement of a white 'g' on a color-blocked background was highly recognizable and attractive, while seeming to capture the essence of Google". Google logo font is Catull BQ, and it was created for Berthold in 1982 by German designer Gustav Jaeger. Catull has a calligraphic feel with contrasting stroke weights and distinctive serifs.
- ↑ "Information about the typeface Catull BQ". Identifont. http://www.identifont.com/find?font=catull&q=Go. Retrieved 2009-08-14.
- ↑ 2.0 2.1 "Google holiday logos". Google. http://www.google.com/holidaylogos.html. Retrieved 2009-08-14.
- ↑ Google Holiday Logos
- ↑ Vise, David; Mark Malseed (November 2005). The Google Story. New York: Bantam Dell. p. 43. ISBN 978-0-553-80457-7.
- ↑ Zjawinski, Sonia. "How Google Got Its Colorful Logo." Wired (Online magazine). February 12, 2008. Retrieved on January 5, 2010.
- ↑ Hwang, Dennis. "Oodles of Doodles." Google (corporate blog). June 8, 2004. Retrieved on July 19, 2006.
- ↑ Williams, David E. "Google's unknown artist has huge following." CNN. July 19, 2006. Retrieved on July 19, 2006.
- ↑ Matthew Moore (2009-09-27). "Googlle: Google releases missspelt logo to mark 11th anniversary". Telegraph.co.uk. http://www.telegraph.co.uk/technology/google/6237306/Googlle-Google-releases-missspelt-logo-to-mark-11th-anniversary.html. Retrieved 2009-09-27.
- ↑ Google logos Valentine's Day logo. February 14, 2007. Retrieved on April 6, 2007.
- ↑ Official Google Blog Strawberries are red, stems are green.
- ↑ Tweaks send Google critics into orbit (By Jim Puzzanghera, Los Angeles Times Staff Writer)October 9, 2007
- ↑ More Google: Holiday Logos
- ↑ The Google Barcode Doodle: A Harbinger of the Internet of Things?
- ↑ Doodle4Google Page
- ↑ 'Doodle 4 Google – My Ireland' competition
- ↑ 'Doodle 4 Google - My India'
- ↑ 'Doodle 4 Google India 2009 Winner Announced'
- ↑ Official Google Blog: "One Fish, Two Fish, Red Fish, Blue Fish
- ↑ 19.0 19.1 http://googleblog.blogspot.com/2009/01/googles-new-favicon.html
- ↑ http://googlesystem.blogspot.com/2009/01/new-google-favicon.html
- ↑ Catull
- Official Google logos
- Dennis Hwang: The man behind Google Doodles
- Fake Google Logos
- Google Style Logos' Online Museum
- Google Logotypes Online Collection
- Google Logos Collection
- Google Logo Museum is an online collection of official Google doodle logos from all over the world.