Google has had several logos since its renaming from BackRub. The current official Google 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. Google subsidiary YouTube has also featured some custom logos to highlight special events occurring on the site, these have been unofficially nicknamed "Yoodles".

In 1998, Sergey Brin created a computerized version of the Google letters using the free graphics program GIMP. 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."

Claude-Achille Debussy (French pronunciation: [klod aʃil dəbysi]) (22 August 1862 – 25 March 1918) was a French composer. Along with Maurice Ravel, he was one of the most prominent figures working within the field of impressionist music, though he himself intensely disliked the term when applied to his compositions. In France, he was made Chevalier of the Legion of Honour in 1903. A crucial figure in the transition to the modern era in Western music, he remains one of the most famous and influential of all composers.

His music is noted for its sensory component and for not often forming around one key or pitch. Often Debussy's work reflected the activities or turbulence in his own life. In French literary circles, the style of this period was known as symbolism, a movement that directly inspired Debussy both as a composer and as an active cultural participant.

Sir Charles Spencer "Charlie" Chaplin, KBE (16 April 1889 – 25 December 1977) was an English comic actor, film director and composer best known for his work during the silent film era. He became the most famous film star in the world before the end of World War I. Chaplin used mime, slapstick and other visual comedy routines, and continued well into the era of the talkies, though his films decreased in frequency from the end of the 1920s. His most famous role was that of The Tramp, which he first played in the Keystone comedy Kid Auto Races at Venice in 1914. From the April 1914 one-reeler Twenty Minutes of Love onwards he was writing and directing most of his films, by 1916 he was also producing them, and from 1918 he was even composing the music for them. With Mary Pickford, Douglas Fairbanks and D. W. Griffith, he co-founded United Artists in 1919.

Chaplin was one of the most creative and influential personalities of the silent-film era. He was influenced by his predecessor, the French silent film comedian Max Linder, to whom he dedicated one of his films. His working life in entertainment spanned over 75 years, from the Victorian stage and the music hall in the United Kingdom as a child performer, until close to his death at the age of 88. His high-profile public and private life encompassed both adulation and controversy. Chaplin was identified with left-wing politics during the McCarthy era and he was ultimately forced to resettle in Europe from 1952.

Maria Gaetana Agnesi (May 16, 1718 – January 9, 1799) was an Italian linguist, mathematician, and philosopher. Agnesi is credited with writing the first book discussing both differential and integral calculus. She was an honorary member of the faculty at the University of Bologna. According to Dirk Jan Struik, Agnesi is "the first important woman mathematician since Hypatia (fifth century A.D.)".

Her sister was Maria Teresa Agnesi Pinottini, a pianist and composer.

Maria Gaetana Agnesi was born in Milan on May 16, 1718, to a wealthy and literate family. Her father wanted to elevate his family into the Milanese nobility. In order to achieve his goal, he had married in 1717 Anna Fortunata Brivio. Her mother's death provided her the excuse to retire from public life. She took over management of the household.

Saul Bass (May 8, 1920 – April 25, 1996) was a graphic designer and filmmaker, perhaps best known for his design of film posters and motion picture title sequences.

During his 40-year career Bass worked for some of Hollywood's greatest filmmakers, including Alfred Hitchcock, Otto Preminger, Billy Wilder, Stanley Kubrick and Martin Scorsese. Amongst his most famous title sequences are the animated paper cut-out of a heroin addict's arm for Preminger's The Man with the Golden Arm, the credits racing up and down what eventually becomes a high-angle shot of the United Nations building in Hitchcock's North by Northwest, and the disjointed text that races together and apart in Psycho.

Bass designed some of the most iconic corporate logos in North America, including the AT&T "bell" logo in 1969, as well as AT&T's "globe" logo in 1983 after the breakup of the Bell System. He also designed Continental Airlines' 1968 "jetstream" logo and United Airlines' 1974 "tulip" logo which became some of the most recognized airline industry logos of the era.