What is "siemens"

n. In the International System of Units, the derived unit of electrical conductance; the electric conductance in a body that has a resistance of one ohm. Symbol: S

1. n. a unit of conductance equal to the reciprocal of an ohm [syn: mho, reciprocal ohm, S]

2. engineer who was a brother of Ernst Werner von Siemens and who moved to England (1823-1883) [syn: Karl Wilhelm Siemens, Sir Charles William Siemens]

3. German electrical engineer (1816-1892) [syn: Ernst Werner von Siemens]

Siemens may refer to

Siemens, a German family name carried by generations of telecommunications industrialists.

These include:

• (Ernst) Werner (since 1888) von Siemens (known as Werner) (1816, Gehrden - 1892), inventor, founder of Siemens AG
  • (Carl) Wilhelm Siemens (known as (Charles) Wilhelm or Sir William Siemens) (1823, Lenthe - 1883), brother of Werner von Siemens
  • Carl (Heinrich) von Siemens (1829, Menzendorf - 1906), brother of Werner von Siemens
  • Georg von Siemens (1839 – 1901), banker and politician, nephew of Werner von Siemens
  • Alexander Siemens (1847, Hanover - 1928), cousin of Werner von Siemens
  • Arnold (since 1888) von Siemens (1853, Berlin - 1918), son of Werner von Siemens
  • (Georg) Wilhelm (since 1888) von Siemens (known as Wilhelm) (1855, Berlin - 1919), son of Werner von Siemens
  • Carl Friedrich von Siemens (1872, Berlin - 1941), son of Werner von Siemens
  • Hermann (Werner) von Siemens (1885, Berlin - 1986), nephew of Werner von Siemens
  • Ernst von Siemens (1903, Kingston upon Thames - 1990), nephew of Werner von Siemens
  • Peter von Siemens (1911, Berlin - 1986), nephew of Werner von Siemens
• Hermann Werner Siemens (1869, Charlottenburg - 1969), geneticist
• Jacob "Jake" (John) Siemens (1896, Altona, Manitoba - 1963), a Canadian social entrepreneur and adult educator of Mennonite descent

ar:سيمنز (توضيح) be-x-old:Сымэнс bar:Siemens (Begriffsklärung) bs:Siemens (čvor) ca:Siemens cs:Siemens da:Siemens de:Siemens (Begriffsklärung) es:Siemens fr:Siemens ko:지멘스 hr:Siemens it:Siemens hu:Siemens nl:Siemens ja:ジーメンス (曖昧さ回避) no:Siemens nn:Siemens pl:Siemens pt:Siemens (desambiguação) ro:Siemens ru:Сименс sk:Siemens sl:Siemens sr:Сименс sh:Simens sv:Siemens

Category:Low German surnames Category:German-language surnames Category:German families Category:Prussian nobility Category:German noble families

Siemens AG is a German company headquartered in Berlin and Munich and the largest engineering company in Europe with branch offices abroad.

The principal divisions of the company are Industry, Energy, Healthineers, and Infrastructure & Cities, which represent the main activities of the company. The company is a prominent maker of medical diagnostics equipment and its medical health-care division, which generates about 12 percent of the company's total sales, is its second-most profitable unit, after the industrial automation division. The company is a component of the Euro Stoxx 50 stock market index. Siemens and its subsidiaries employ approximately 362,000 people worldwide and reported global revenue of around €71.9 billion in 2014 according to their annual report.

Siemens is a German engineering, electrical and telecommunications company conglomerate, founded by the Siemens family.

Siemens may also refer to

• Siemens (surname)
• Werner von Siemens, a German inventor and founder of engineering company Siemens AG.
• Siemens (unit), the SI unit of electrical conductance, equivalent to 1 ampere/volt
• Siemens mercury unit, an obsolete electrical resistance unit
• Siemens (train), a subtype of the Siemens Modular Metro train that operates in Melbourne, Australia. Originally known as the "NEXAS"
• Siemens, Michigan, a community in the United States

The siemens (SI unit symbol: S) is the unit of electric conductance, electric susceptance and electric admittance in the International System of Units (SI). Conductance, susceptance, and admittance are the reciprocals of resistance, reactance, and impedance respectively; hence one siemens is equal to the reciprocal of one ohm, and is also referred to as the mho. The 14th General Conference on Weights and Measures approved the addition of the siemens as a derived unit in 1971.

The unit is named after Ernst Werner von Siemens. As with every SI unit whose name is derived from the proper name of a person, the first letter of its symbol is upper case (S); the lower-case "s" is the symbol for the second (unit of time). When an SI unit is spelled out in English, it should always begin with a lower-case letter (siemens), except where any word would be capitalized. In English, the same form siemens is used both for the singular and plural.