All articles starting with O

Oskolki

Oskolki (Осколки, "Splinters") was a Russian weekly humorous literary magazine with caricatures, published in Saint Petersburg from 1881 to 1916. It printed over 270 early works of Anton Chekhov.

Osla Benning

Osla Benning (Margaret Osla Benning, 1921-1974), Canadian-born heiress, Bletchley Park Hut 4 German-French translator, Prince Philip's wartime girlfriend, later wife of the 8th Baron Henniker.

Osleidys Menéndez Sáez (Osleidys Menendez), Cuban javelin thrower born 1979; 2004 Olympic champion, 2000 bronze, world champion 2001 and 2005, world record 71.70 m (2005); defected from Cuba after 2012.

Osler Diagnostics

Osler Diagnostics is a British medical diagnostics company spun out of the University of Oxford in 2017 to develop the Osler Origin, a portable point-of-care blood testing platform.

Oslo

Oslo (Oslove) is the capital and largest city of Norway, a municipality and county at the head of the Oslo Fjord with about 728,700 inhabitants in 2026, founded around 1000 AD, renamed Christiania 1624–1925, with a parliamentary city government since 1986.

Oslo Accords (הסכמי אוסלו)

Oslo Accords (הסכמי אוסלו), 1993–1995 agreements between Israel and the PLO: mutual recognition, the Palestinian Authority, Areas A/B/C, deferred Jerusalem, refugees, borders, and statehood; process collapsed in 2000.

Oslo Airport, Gardermoen

Oslo Airport, Gardermoen, also known as Oslo lufthavn, Gardermoen, is Norway's main international airport, serving Oslo and Eastern Norway. Opened in 1998, it handled 27.1 million passengers in 2025.

Oslo County

Oslo County (Oslo fylke) is the Norwegian county comprising the capital city of Oslo, unusual in being both a municipality and a county and the most populous county.

Oslo method

The Oslo method, developed at the Oslo Cyclotron Laboratory in Norway, extracts the nuclear level density and γ-ray strength function from particle-γ coincidence data, feeding neutron-capture calculations for astrophysics and reactors.

Oslo Opera House

Oslo Opera House (Operahuset), home of the Norwegian National Opera and Ballet in Bjørvika, Oslo; designed by Snøhetta, opened 12 April 2008, cost 4.3 billion NOK, and famous as the first opera house with a publicly walkable marble roof.

Oslo Stock Exchange

The Oslo Stock Exchange, also known as Oslo Børs, is Norway's main securities exchange, opened in Christiania in 1819 and owned by the pan-European exchange group Euronext since 2019.

Oslo University Hospital

Oslo University Hospital (Oslo universitetssykehus) is Norway's largest hospital, a university hospital created in 2008 by merging Aker, Rikshospitalet, and Ullevål, with roots tracing to 1826.

Oslofjord Tunnel

The Oslofjord Tunnel (Oslofjordtunnelen) is a 7,306-meter subsea road tunnel on European route E134 under the Oslofjord in Norway, opened in 2000 as part of the Oslofjord Connection.

Osman

Osman is a baroque epic in twenty cantos by the Dubrovnik writer Ivan Gundulić, covering the 1621 Battle of Khotyn and the 1622 downfall of Sultan Osman II.

Osman Bey

Osman Bey (Osman Gazi, Osman I), c. 1258–1324, Kayı Turkmen son of Ertuğrul Gazi; founded the Ottoman beylik at Söğüt in 1299, expanded it from 4,800 to 16,000 km², and was succeeded by his son Orhan. Distinct from the composer Büyük Osman Bey and Kara Yülük Osman Bey.

Sep 24, 2026

Osman Digna

Osman Digna (عثمان دقنة), born Uthman Abu Bakr Diqna around 1840, was a Sudanese leader who raised the Beja tribes against Egyptian and British forces in the Mahdist War.

Osman Hadi

Osman Hadi, also known as Sharif Osman Bin Hadi, was a Bangladeshi political activist and poet, spokesperson for Inqilab Mancha, shot in Dhaka in December 2025.

Sep 23, 2026

Osman Hamdi Bey

Osman Hamdi Bey (عثمان حمدي بك) was an Ottoman painter, archaeologist, and museum director who led the Imperial Museum from 1881 until his death in 1910.

Osman I

Osman I (Osman Gazi, عثمان, c. 1258–1324), Turkmen frontier lord son of Ertuğrul of Söğüt, founder of the Ottoman dynasty; won Bapheus 1302, coined money 1301, expanded in Bithynia.

Osman II (عثمان ثانی)

Osman II (عثمان ثانی, Genç Osman, 1604–1622), Ottoman sultan 1618–1622; after the failed 1621 Khotin campaign and reform plans against the Janissaries he was deposed and strangled at Yedikule, the first regicide in Ottoman history.

Osman III

Osman III (عثمان, 1699–1757) was an Ottoman sultan reigning 1754–1757 after decades of palace confinement; known for frequent vizier changes, the Nuruosmaniye Mosque, the 1756 Cibali fire, neutrality in the Seven Years' War, and dying childless, succeeded by Mustafa III.

Osman Khalid Butt (عثمان خالد بٹ)

Osman Khalid Butt (عثمان خالد بٹ), born 1986, is a Pakistani actor, writer, choreographer, and director from Islamabad, known for Aik Nayee Cinderella, Aunn Zara, Diyar-e-Dil, Chupke Chupke, writing Siyaah and Janaan, and his viral parody vlogs.

Osman Lins

Osman Lins, full name Osman da Costa Lins (1924–1978), was a Brazilian novelist, short-story writer, playwright, and essayist from Pernambuco, best known for the formally experimental 1973 novel Avalovara.

Sep 20, 2026

Osman M. Bakr

Osman M. Bakr is a Saudi materials scientist and professor at KAUST in Saudi Arabia, known for perovskite single crystals for solar cells and radiation detection.

Osman Mahamuud

Osman Mahamuud (Cismaan Maxamuud) was the sultan of the Majeerteen Sultanate on the northeastern Somali coast who reigned from the 1860s until his surrender to Italy in 1927.