Balmer is a surname, and may refer to:

Steven Anthony "Steve" Ballmer (born March 24, 1956) is the chief executive officer of Microsoft, having held that post since January 2000. As of 2012^[update], his personal wealth is estimated at $15.7 billion, ranking number 19 on the Forbes 400.

Ballmer was born in Detroit, Michigan to a Swiss American father and a Jewish American mother. He grew up in the community of Farmington Hills, Michigan. In 1973, he attended college prep and engineering classes at Lawrence Technological University and graduated from Detroit Country Day School, a private college preparatory school in Beverly Hills, Michigan, with a perfect score of 800 on the mathematical section of the SAT. He now sits on the school's board of directors. In 1977, he graduated magna cum laude from Harvard University with a A.B. in mathematics and economics.

At college, Ballmer managed the football team, worked on The Harvard Crimson newspaper as well as the Harvard Advocate, and lived down the hall from fellow sophomore Bill Gates. He then worked for two years as an assistant product manager at Procter & Gamble, where he shared an office with Jeffrey R. Immelt, who later became CEO of General Electric. In 1980, he dropped out of the Stanford Graduate School of Business to join Microsoft.

Johann Jakob Balmer (May 1, 1825 – March 12, 1898) was a Swiss mathematician and mathematical physicist.

Balmer was born in Lausen, Switzerland, the son of a Chief Justice also named Johann Jakob Balmer. His mother was Elizabeth Rolle Balmer, and he was the oldest son. During his schooling he excelled in mathematics, and so decided to focus on that field when he attended university.

He studied at the University of Karlsruhe and the University of Berlin, then completed his Ph.D. from the University of Basel in 1849 with a dissertation on the cycloid. Johann then spent his entire life in Basel, where he taught at a school for girls. He also lectured at the University of Basel. In 1868 he married Christine Pauline Rinck at the age of 43. The couple had a total of six children.

Despite being a mathematician, he is not remembered for any work in that field; rather, his major contribution (made at the age of sixty, in 1885) was an empirical formula for the visible spectral lines of the hydrogen atom, the study of which he took up at the suggestion of Eduard Hagenbach also of Basel. Using Ångström's measurements of the hydrogen lines, he arrived at a formula for computing the wavelength as follows:

Alexandre-Pierre Georges (Sacha) Guitry (21 February 1885 – 24 July 1957) was a French stage actor, film actor, director, screenwriter, and playwright of the Boulevard theatre.

Guitry was born in Saint Petersburg, Russia, in 1885, the son of the well-known actor Lucien Guitry. Sacha was first on stage at age five. He developed a charming, witty stage persona, often appearing in period-dress light comedies, for instance his 1925 pastiche Mozart, which contains a story about the fictional adventures of Wolfgang Amadeus Mozart on a visit to Paris. In his 1937 film Pearls of the Crown he plays four roles, one of them being Napoleon III.

Both enormously popular and enormously productive through the 1920s, Guitry was responsible for 124 plays (some written in less than three days), more than 30 books, and a heavy schedule of performances and appearances. In 1919 he married actress Yvonne Printemps, but it was his third marriage, to actress Jacqueline Delubac, in 1935, that encouraged Guitry to document his stage performances on film. He directed 33 movies, and married twice more.