King Oliver was an American cornetist who was a vital link between the semi-mythical prehistory of jazz and the firmly documented history of jazz proper. He is also remembered for choosing as his protégé the man generally considered to have been the greatest of all New Orleans musicians, Louis

Mary Oliver was an American poet whose work reflects a deep communion with the natural world as well as a belief that poetry “mustn’t be fancy.” Oliver, who had a devoted following, was known for her use of plain language and accessible imagery. In 1984 she won a Pulitzer Prize for the collection

Sy Oliver was a jazz trumpeter, composer, and bandleader who was one of the leading music arrangers of the 1930s and ’40s. Both of Oliver’s parents were music teachers in Ohio, where he grew up. He played the trumpet as a boy and at the age of 17 took a job (1927–30) with Zack Whyte and his

disability studies: Michael Oliver, a disabled sociologist, helped to push the movement into academia with his book Politics of Disablement: A Sociological Approach (1990), in which he analyzed how a social issue such as disability gets cast as an individual medicalized phenomenon.

Sy Oliver was a jazz trumpeter, composer, and bandleader who was one of the leading music arrangers of the 1930s and ’40s. Both of Oliver’s parents were music teachers in Ohio, where he grew up. He played the trumpet as a boy and at the age of 17 took a job (1927–30) with Zack Whyte and his

Pesaro: ) The Oliveriano Archaeological Museum is important for students of Italian antiquities. The composer Gioacchino Antonio Rossini, a native of Pesaro, left his fortune to found a music school there.

Pauline Oliveros was an American composer and performer known for conceiving a unique, meditative, improvisatory approach to music called “deep listening.” Oliveros was raised in a family that encouraged involvement with music. At age 10 she was introduced to the accordion by her mother, who was a

Mount of Olives, multi-summit limestone ridge just east of the Old City of Jerusalem and separated from it by the Kidron Valley. Frequently mentioned in the Bible and later religious literature, it is holy to Judaism, Christianity, and Islam. The peak usually regarded as the Mount of Olives proper

Olivet College, private, coeducational institution of higher learning in Olivet, Mich., U.S., located about 30 miles (50 km) southwest of Lansing. A liberal arts college affiliated with the Congregational Christian Church and the United Church of Christ, it offers bachelor’s degree programs in arts

Mount of Olives: …the Crucifixion, in his so-called Olivet Discourse, he foretells the destruction of Jerusalem and the end of the world (Matthew 24–25; Mark 13; Luke 21). The traditional site of the Garden of Gethsemane, where Jesus prayed just before he was betrayed by Judas Iscariot (Matthew 26; Mark 14), is on…

Bonaventure Des Périers: He assisted Pierre-Robert Olivétan and Jacques Lefèvre d’Étaples in the preparation of the vernacular version of the Old Testament and Étienne Dolet in the Commentarii linguae Latinae. Margaret of Angoulême, queen of Navarre, made him her valet de chambre in 1536. He acted as her secretary and…

Olivetti & C. SpA, Italian multinational firm that manufactures office equipment and information systems. Headquarters are in Ivrea, Italy. Founded by Camillo Olivetti (1868–1943), an electrical engineer, the company began making typewriters in 1908. In 1925 Olivetti dispatched his son Adriano

Olivetti & C. SpA: …1925 Olivetti dispatched his son Adriano Olivetti to study modern manufacturing techniques and plant management in the United States. Upon his return, the company underwent a complete reorganization that included streamlining and modernizing operations and development of a new typewriter design, the M-40, which won wide acceptance in the 1930s.

Olivetti & C. SpA: Founded by Camillo Olivetti (1868–1943), an electrical engineer, the company began making typewriters in 1908. In 1925 Olivetti dispatched his son Adriano Olivetti to study modern manufacturing techniques and plant management in the United States. Upon his return, the company underwent a complete reorganization that included streamlining…

Emily Pomona Edson Briggs was an American journalist, one of the first women to acquire a national reputation in the field. Emily Edson grew up in Burton, Ohio, and, from 1840, near Chicago, attending local schools. She taught briefly and, about 1854, married John R. Briggs. In 1861, when her

Twelfth Night: …in love with the lady Olivia. Orsino sends Viola-Cesario to plead his cause to Olivia, who promptly falls in love with the messenger. Viola, meanwhile, is in love with Orsino, and, when her twin, Sebastian, is rediscovered, many comic situations of mistaken identity ensue. There is a satiric subplot involving…

olive shell, any of the marine snails that constitute the family Olividae (subclass Prosobranchia of the class Gastropoda). Fossils of the genus Oliva are common from the Eocene Epoch (57.8 to 36.6 million years ago) to the present. The shell, which is distinctive and easily recognizable, has a

Laurence Olivier was a towering figure of the British stage and screen, acclaimed in his lifetime as the greatest English-speaking actor of the 20th century. He was the first member of his profession to be elevated to a life peerage. The son of an Anglican minister, Olivier attended All Saints

bicycle: From boneshakers to bicycles: …the Olivier brothers, René and Aimé. In 1865 these two rich young men pedaled velocipedes more than 800 km (500 miles) from Paris to Marseille, and their subsequent enthusiasm for the new sport helped it to become a worldwide craze for the young, fit, and well-to-do. The brothers paid 50,000…

Émile Ollivier was a French statesman, writer, and orator who, as minister of justice under Napoleon III, authored an abortive plan for achieving a governmental compromise between Napoleonic autocracy and parliamentary democracy. Trained in the law and, in his early life, an adherent of the

Isaac Oliver was a miniature painter. Oliver’s French Huguenot parents took him to England about 1568, where he studied painting and married the daughter of a then well-known portrait painter, Marcus Gheeraerts the Elder. Oliver soon won renown and royal patronage for his miniatures, including

Laurence Olivier was a towering figure of the British stage and screen, acclaimed in his lifetime as the greatest English-speaking actor of the 20th century. He was the first member of his profession to be elevated to a life peerage. The son of an Anglican minister, Olivier attended All Saints

Laurence Olivier was a towering figure of the British stage and screen, acclaimed in his lifetime as the greatest English-speaking actor of the 20th century. He was the first member of his profession to be elevated to a life peerage. The son of an Anglican minister, Olivier attended All Saints

Laurence Olivier was a towering figure of the British stage and screen, acclaimed in his lifetime as the greatest English-speaking actor of the 20th century. He was the first member of his profession to be elevated to a life peerage. The son of an Anglican minister, Olivier attended All Saints

bicycle: From boneshakers to bicycles: …linked with the Olivier brothers, René and Aimé. In 1865 these two rich young men pedaled velocipedes more than 800 km (500 miles) from Paris to Marseille, and their subsequent enthusiasm for the new sport helped it to become a worldwide craze for the young, fit, and well-to-do. The brothers…

Laurence Olivier was a towering figure of the British stage and screen, acclaimed in his lifetime as the greatest English-speaking actor of the 20th century. He was the first member of his profession to be elevated to a life peerage. The son of an Anglican minister, Olivier attended All Saints

Jamaica: The crown colony: …architecture were subsequently altered, and Sir Sydney Olivier (later Lord Olivier) rebuilt its public offices on the finest street of the city. The economy recovered slowly from the disaster, and unemployment remained a problem. In the early 20th century thousands of Jamaicans migrated to help build the Panama Canal or…

olivine, any member of a group of common magnesium, iron silicate minerals. Olivines are an important rock-forming mineral group. Magnesium-rich olivines are abundant in low-silica mafic and ultramafic igneous rocks and are believed to be the most abundant constituent of the Earth’s upper mantle.

human ear: Descending pathways: …a fibre tract called the olivocochlear bundle. It constitutes an efferent system, or feedback loop, by which nerve impulses, thought to be inhibitory, reach the hair cells. This system, which uses acetylcholine as a neurotransmitter, is presumably involved in sharpening, or otherwise modifying, the analysis that is made in the…

Olivos, cabecera (county seat) of Vicente López partido (county), Gran (Greater) Buenos Aires, eastern Argentina. It is located directly north of the city of Buenos Aires, in Buenos Aires provincia (province), on the Río de la Plata estuary. The site of present-day Olivos was during the 16th and

Carlos Menem: The Olivos Pact (1994), an agreement between Menem and the opposing Congressional party, allowed him to revise the constitution of 1853 to permit his reelection as president in 1995 (the pact also limited presidential terms to four years and imposed restrictions on executive control over certain…

Austria: Austria as a great power: …some military successes, but the Treaty of Oliva (1660) brought no territorial gains for Austria, though it stopped the advance of the Swedes in Germany.

Temür was the grandson and successor of the great Kublai Khan; he ruled (1295–1307) as emperor of the Yuan (Mongol) dynasty (1206–1368) of China and as great khan of the Mongol Empire. He was the last Yuan ruler to maintain firm control over China, but he never exercised real power over Mongol

Öljeitü was the eighth Il-Khan ruler of Iran, during whose reign the Shīʿite branch of Islam was first proclaimed the state religion of Iran. A great-grandson of Hülegü, founder of the Il-Khanid dynasty, Öljeitü was baptized a Christian and given the name Nicholas by his mother. As a youth he

Öljeitü was the eighth Il-Khan ruler of Iran, during whose reign the Shīʿite branch of Islam was first proclaimed the state religion of Iran. A great-grandson of Hülegü, founder of the Il-Khanid dynasty, Öljeitü was baptized a Christian and given the name Nicholas by his mother. As a youth he

Olkhon Island, island in Lake Baikal, administered as part of Irkutsk oblast (province), east-central Russia. It is separated from the lake’s western shore by the straits of Olkhon and the Maloye More (Little Sea). Its area is 280 square miles (730 square km), and its highest point, Mount Zhima,

theatre music: Stage musicals: …erstwhile Soviet Union, the musicologist Andrey Olkhovsky once noted that

saga: Sagas of Icelanders: Ǫlkofra þáttr (the term þáttr is often used for a short story) and Bandamanna saga (“The Confederates’ Saga”) satirize chieftains who fail in their duty to guard the integrity of the law and try to turn other people’s mistakes into profit for themselves. The central…

William Salesbury: …a collection of Welsh proverbs, Oll Synnwyr Pen Kembero Ygyd (“The Whole Sense of a Welshman’s Head”), possibly the first book printed in Welsh. His Dictionary in Englyshe and Welshe (1547), the first work of its kind, appeared in a facsimile edition in 1877. His translation of the New Testament…

Roussillon: Ollada, or ouillade, is a beef stew cooked in a heavy pot. Cargolada is a dish of escargots. Notable wines come from Banyuls-sur-Mer, Rivesaltes, and Maury.

tlachtli: …the ritual ball game (ollama) played throughout pre-Columbian Mesoamerica. Possibly originating among the Olmecs (La Venta culture, c. 800–c. 400 bce) or even earlier, the game spread to subsequent cultures, among them those of Monte Albán and El Tajín; the Maya (as pok-ta-pok); and the Toltec, Mixtec, and Aztec.…

fili: The highest grade was the ollamh, achieved after at least 12 years of study, during which the poet mastered more than 300 difficult meters and 250 primary stories and 100 secondary stories. Attaining the highest grade entitled a fili to wear a cloak of crimson-colored bird feathers and carry a…

pool: …was invented in 1864 by Joseph Oller (1839–1922), a French impresario and part-time bookmaker. He also solved the problem of the time-consuming work of dividing the prize money among the winners in proportion to the size of their wagers by inventing a mechanical machine, the compteur totalisateur, to perform the…

Ull, in Norse mythology, a god associated with skis and the bow, according to the Icelandic poet and historian Snorri Sturluson in his Prose Edda. Ull is said there to be the handsome son of Sif and the stepson of her husband Thor. Ull possessed warrior-like attributes and was called upon for aid

skateboarding: …hands-free aerial known as the ollie is one of the most important tricks in contemporary skateboarding. It was invented in 1978 by Alan (“Ollie”) Gelfand, who discovered that slamming his foot down on the kicktail and simultaneously sliding his front foot forward caused the board and himself to jump into…

enchondroma: …with the lesions produced in enchondromatosis (also called Ollier disease).

Émile Ollivier was a French statesman, writer, and orator who, as minister of justice under Napoleon III, authored an abortive plan for achieving a governmental compromise between Napoleonic autocracy and parliamentary democracy. Trained in the law and, in his early life, an adherent of the

olm, (Proteus anguinus), blind salamander belonging to the family Proteidae (order Caudata). It lives in the subterranean streams in karst areas of the Adriatic coast from northeastern Italy southward into Montenegro. As an aquatic cave dweller, the olm has lost its skin pigmentation, and its

Olmaliq, city, eastern Uzbekistan. It is situated 35 miles (55 km) southeast of the city of Tashkent on the northern slopes of the Qurama Mountains and on the left bank of the Ohangaron River. Olmaliq was founded in 1951 from several settlements exploiting the rich nonferrous-metal resources of the

Olmec, the first elaborate pre-Columbian civilization of Mesoamerica (c. 1200–400 bce) and one that is thought to have set many of the fundamental patterns evinced by later American Indian cultures of Mexico and Central America, notably the Maya and the Aztec. The Nahuatl (Aztec) name for these

John II: …vanquished the dissidents at the Battle of Olmedo in 1445.

José Joaquín Olmedo was a poet and statesman whose odes commemorating South America’s achievement of independence from Spain captured the revolutionary spirit of his time and inspired a generation of Romantic poets and patriots. They have remained monuments to the heroic figures of the liberation

José Joaquín Olmedo was a poet and statesman whose odes commemorating South America’s achievement of independence from Spain captured the revolutionary spirit of his time and inspired a generation of Romantic poets and patriots. They have remained monuments to the heroic figures of the liberation

Ehud Olmert is an Israeli politician who served as mayor of Jerusalem (1993–2003) and as prime minister of Israel (2006–09). Olmert’s parents were members of the Irgun Zvai Leumi, a militant Jewish group that fought for the establishment of Israel. In the mid-1950s and early ’60s, Olmert’s father,

Ermanno Olmi was an Italian motion-picture director whose formative work examined life in the business world and whose later films explored religious and social themes. Olmi attended a science high school and took courses in acting at the Academy of Dramatic Arts in Milan. He learned filmmaking

primate: Renewed interest in primate origins: …Hill man in England, the Olmo remains in Italy, and the Calaveras skull in the United States have been shown to be recent intrusions (burials in the case of Galley Hill and Olmo, fraudulent in the case of Calaveras) into Pliocene or Pleistocene levels (5.3 million to 11,700 years ago).…

Spanish literature: Theatre: …this group’s realist style is Lauro Olmo’s La camisa (1962; The Shirt), which depicts unemployed workers too poverty-stricken to seek employment because doing so requires a clean shirt. Like the social novel, social theatre featured generic or collective protagonists, economic injustices, and social-class conflicts, their depictions calculated to suggest Franco’s…

Edward James Olmos is a Mexican American actor, director, producer, and activist known for his gruff voice and distinctive features and for his crafting of complex Latino characters in film, television, and theater. He had regular roles in the television series Miami Vice (1984–89), American Family

Americans with Disabilities Act: In Olmstead v. L.C. (1999), the court ruled that two developmentally disabled women being held in a large psychiatric institution run by the state of Georgia should be allowed to relocate to smaller group homes and that prohibiting them from doing so constituted segregation and discrimination.…

Puerto Rico: Early years: The Olmsted Act, approved by the U.S. Congress in July 1909, gave the U.S. president a more direct role in Puerto Rican affairs. However, the majority of Puerto Ricans eventually demanded a larger measure of local control and many other changes. During World War I the…

Frederick Law Olmsted was an American landscape architect who designed a succession of outstanding public parks, beginning with Central Park in New York City. When Olmsted was 14 years old, sumac poisoning seriously affected his eyesight and limited his education. As an apprentice topographic

Olomouc, city, northeastern Czech Republic. The city lies along the Morava River at its confluence with the Bystřice River, at the northern edge of the fertile Haná farming region. Olomouc possibly originated as a Roman fort (Mons Iulii) and by the 9th century was an important stronghold. A

Punctation of Olmütz, (Nov. 29, 1850), agreement signed at Olmütz (Olomouc, Moravia, in modern Czech Republic) between Prussia and Austria that regulated those two powers’ relations. The development leading up to the punctation was triggered when the elector of Hesse in the autumn of 1850 appealed

Punctation of Olmütz, (Nov. 29, 1850), agreement signed at Olmütz (Olomouc, Moravia, in modern Czech Republic) between Prussia and Austria that regulated those two powers’ relations. The development leading up to the punctation was triggered when the elector of Hesse in the autumn of 1850 appealed

English literature: Poets and poetry after Pope: …was William Cowper in his Olney Hymns (1779). Both are worthy successors to the richly inventive work of Isaac Watts in the first half of the century. Elsewhere, Cowper can write with buoyant humor and satiric relaxation, as when, for instance, he wryly observes from the safety of rural seclusion…

Richard Olney was the U.S. secretary of state (1895–97) who asserted, under the Monroe Doctrine, the right of the United States to intervene in any international disputes within the Western Hemisphere. A Boston attorney who had served only one term in the Massachusetts legislature (1873–74), Olney

Ironwood Forest National Monument: …preserves a significant stand of desert ironwood trees (Olneya tesota), a species endemic to the Sonoran Desert. The ironwood was named for the extreme density of its wood; it can reach 45 feet (14 metres) in height and live for more than 800 years. It serves as a “nurse plant,”…

Oceanic art and architecture: The Sepik River regions: Among the Olo tribe, for example, the triangles are formed from a group of scrolls. Triangular designs can also be found painted on bark sheets used by various groups for initiations and on huge conical masks used by several groups in healing rituals. The Telefomin carved the…

Georg Stiernhielm was a poet and scholar, often called “the father of Swedish poetry.” Stiernhielm, the son of a miner, studied at Uppsala and spent several years at the German universities of Greifswald, Wittenberg, and Helmstedt. He returned to Sweden in 1626 and soon obtained a judicial position

Georg Stiernhielm was a poet and scholar, often called “the father of Swedish poetry.” Stiernhielm, the son of a miner, studied at Uppsala and spent several years at the German universities of Greifswald, Wittenberg, and Helmstedt. He returned to Sweden in 1626 and soon obtained a judicial position

Georg Stiernhielm was a poet and scholar, often called “the father of Swedish poetry.” Stiernhielm, the son of a miner, studied at Uppsala and spent several years at the German universities of Greifswald, Wittenberg, and Helmstedt. He returned to Sweden in 1626 and soon obtained a judicial position

Maasai: …by a ritual expert (oloiboni) who, although he has no political power, is religious head of his people.

Convolvulaceae: Major genera and species: The seeds of two species, Turbina corymbosa and Ipomoea violacea, are sources of hallucinogenic drugs of historical interest and contemporary concern.

El Salvador: Drainage: …miles [100 square km]), and Olomega (20 square miles [52 square km]).

Olomouc, city, northeastern Czech Republic. The city lies along the Morava River at its confluence with the Bystřice River, at the northern edge of the fertile Haná farming region. Olomouc possibly originated as a Roman fort (Mons Iulii) and by the 9th century was an important stronghold. A

Olomouc: At the Peace of Olomouc (1478), Moravia was ceded to Hungary. Olomouc was considered the Moravian capital during the Thirty Years’ War (1618–48), when it was occupied and plundered by the Swedes. The badly damaged town was displaced after 1640 by Brno as the foremost city of…

Karelian language: …dialects of Karelian—Karelian proper and Olonets. Ludic, a minor group of dialects spoken to the southeast of Karelia, is considered to be a blend of Karelian and Veps, a related Finno-Ugric language spoken to the south of Karelia. A four-line fragment written in Karelian dates from the 13th century. In…

Olongapo, city, western Luzon, Philippines. The city is situated in a lowland area near the head of Subic Bay. Olongapo was heavily damaged during World War II (1939–45). It became a municipality in 1959 and a chartered city in 1966. The U.S. military’s Subic Bay Naval Station was located nearby

Olongapo, city, western Luzon, Philippines. The city is situated in a lowland area near the head of Subic Bay. Olongapo was heavily damaged during World War II (1939–45). It became a municipality in 1959 and a chartered city in 1966. The U.S. military’s Subic Bay Naval Station was located nearby

African religions: Worldview and divinity: … hold that the Almighty Creator, Olorun, oversees a pantheon of secondary divinities, the orisha. Devotion to the orisha is active and widespread, but Olorun has neither priests nor cult groups. Similarly, in the Great Lakes region of East Africa, the Supreme Being, Mulungu, is thought to be omnipresent but is…

Lahaina: The Olowalu petroglyphs, 5 miles (8 km) east, are rock carvings (some thought to be more than 300 years old) that depict occupations of the early Hawaiians.

African literature: Yoruba: Femi Jeboda wrote Olowolaiyemo (1964), a realistic novel having to do with life in a Yoruba city. Adebayo Faleti’s works, such as the short novel Ogun awitele (1965; “A War Foreseen”) and the narrative poem Eda ko l’aropin (1956; “Don’t Underrate”), display fantasy roots. Faleti also published a…

Mbari Mbayo Club: Senabu Oloyede and Kikelomo Oladepo both worked in cloth dyeing (traditionally reserved for women) and used the traditional indigo dye, producing works contemporary in style.

Yves Béhar: …Negroponte and his nonprofit organization One Laptop per Child (OLPC).

fungus: Annotated classification: Order Olpidiopsidales Pathogenic on marine plants, including laver (nori); thallus infects cells of host; example genus is Olpidiopsis. Order Peronosporales Aquatic or terrestrial; parasitic on algae or vascular plants, the latter mostly obligate parasites causing downy mildews; in advanced

four-eyed opossum: Olrog’s four-eyed opossum (P. olrogi) occurs in Peru and Bolivia.

four-eyed opossum: Olrog’s four-eyed opossum (P. olrogi) occurs in Peru and Bolivia.

Elizabeth Olsen is an American actress who first gained notice for her work in independent films and later became an international star with her portrayal of Wanda Maximoff/Scarlet Witch in the Marvel Cinematic Universe blockbuster franchise. Her other notable credits include the crime-drama Wind

Gregory Olsen is an American scientist and entrepreneur, known as the third space tourist. Olsen earned a bachelor of science degree in physics in 1966, a bachelor of science degree in electrical engineering in 1968, and a master of science degree in physics in 1968 from Fairleigh Dickinson

Gregory Olsen is an American scientist and entrepreneur, known as the third space tourist. Olsen earned a bachelor of science degree in physics in 1966, a bachelor of science degree in electrical engineering in 1968, and a master of science degree in physics in 1968 from Fairleigh Dickinson

children’s literature: Denmark: …Danish Children’s Book Prize, and Ib Spang Olsen, with his nonsense picture book The Boy in the Moon (1962). As for the complementary prose tradition of fireside tales, Denmark had to wait (Andersen was artist, not scholar) for its Grimm until 1884, when a collection made by Svend Grundtvig, the…

Tillie Olsen: Early writing: …hearing a young longshoreman named Jack Olsen call for a major strike on San Francisco’s waterfront, Tillie and Abe Goldfarb moved there to help support the strikers. Under her maiden name she submitted two angry political poems to the Partisan magazine and the Daily Worker newspaper, which accepted them immediately,…

decision making: Appropriate decision making: March and Johan P. Olsen showed how the logic of appropriateness inverts the causal logic of rational decision making. Individuals form opinions and make decisions to be appropriate in their surroundings, to fit in with those around them. This means that context precedes preference, and social interaction…

Merlin Olsen was an American gridiron football player, sports announcer, and actor who was one of the most extraordinary defensive linemen in National Football League (NFL) history. Olsen, a 6-ft 5-inch (1.9 meter) tackle, was a consensus All-American in his senior season at Utah State University,

Merlin Olsen was an American gridiron football player, sports announcer, and actor who was one of the most extraordinary defensive linemen in National Football League (NFL) history. Olsen, a 6-ft 5-inch (1.9 meter) tackle, was a consensus All-American in his senior season at Utah State University,

The Brady Bunch: …(Eve Plumb), and Cindy (Susan Olsen); and Alice Nelson (Ann B. Davis), the wisecracking live-in housekeeper. While the initial season’s stories sometimes touched on the difficulties of adjusting to life in a combined family, the overall focus of the series was on the ordeals of growing up, such as…

Tillie Olsen was an American writer and social activist known for her powerful fiction about the inner lives of the working poor, women, and minorities. Her interest in long-neglected women authors inspired the development of academic programs in women’s studies, especially at the university level

Tillie Olsen was an American writer and social activist known for her powerful fiction about the inner lives of the working poor, women, and minorities. Her interest in long-neglected women authors inspired the development of academic programs in women’s studies, especially at the university level

Charles Olson was an American poet and literary theorist, widely credited with first using the term postmodern in discussing American poetry and known for his association with the Black Mountain poets and for his influence on the generation of American poets who emerged after World War II. Olson

Charles Olson was an American poet and literary theorist, widely credited with first using the term postmodern in discussing American poetry and known for his association with the Black Mountain poets and for his influence on the generation of American poets who emerged after World War II. Olson