All articles A–Z

Slot filling

Slot filling is a natural language processing task that extracts specific attribute values, called slots, from unstructured text to fill a fixed template or knowledge base entry.

Slot machine: coin-operated gambling device with spinning reels or video reels. From Sittman and Pitt (1891) and Charles Fey's Liberty Bell (c. 1895) to electromechanical, video, and online slots; RNG-regulated, $35.51B US revenue in 2023.

Slot trading

Slot trading is the buying, selling, leasing, or swapping of airport slots, the take-off and landing authorizations airlines hold, as a secondary market at congested airports.

Slot-die coating

Slot-die coating is a pre-metered coating process that delivers liquid through a fixed slot onto a moving substrate, producing uniform thin films with preset thickness.

Sloth

Sloths are arboreal, leaf-eating mammals found in Central and South America. They are classified into two genera, Choloepus and Bradypus, characterized by a slow movement and low metabolism.

Sloth (deadly sin)

Sloth, known in Catholic tradition as acedia or the noonday demon, is one of the seven deadly sins: sorrowful aversion to the spiritual good, not simple laziness.

Sloth bear

Sloth bear (Melursus ursinus), an insect-eating Vulnerable bear of India, Sri Lanka and Nepal; eats termites and ants, carries cubs on its back, and is the only bear missing upper incisors.

Slotline

Slotline is a planar microwave transmission medium proposed by S. B. Cohn in 1968. It features a narrow gap in a dielectric substrate to support frequencies in the 60 to 200 ohm range.

Oct 21, 2026

Slots City

Slots City (Слотс Сіті) is a gambling brand: a Ukrainian licensed casino and slot-hall network (Gamedev, KRAIL No. 47, 2021; later PlayCity No. 137-R) and a separate Curaçao-licensed online casino run by Sharkscode B.V. for Canadian players.

Slotted line

A slotted line is a microwave measurement instrument whose movable probe, slid along a slotted transmission line, measures VSWR and impedance, tracing to Heinrich Hertz's 1888 experiments.

Slotting (warehouse management)

Slotting in warehouse management is the assignment of stock-keeping units to bin locations to minimize picking time and maximize accuracy; slotting optimization plans placement by demand, and re-slotting revises assignments as demand shifts.

Slouch hat

Slouch hat: broad-brimmed felt hat with one side turned up, official Australian Army headdress as Hat Khaki Fur Felt (KFF). Adopted 1885 by the Victorian Mounted Rifles, standardized 1903, associated with the puggaree, Rising Sun badge, and emu plumes.

Slouching Towards Bethlehem

Slouching Towards Bethlehem is Joan Didion's 1968 essay collection, her first nonfiction book, portraying 1960s California and America. Its title essay reports on Haight-Ashbury hippies, taking its title from Yeats's "The Second Coming."

Slough

Slough, England, is a Berkshire town about 20 miles west of central London, known for the Slough Trading Estate, the largest business park in Europe under single ownership.

Slough House (novel series)

Slough House is Mick Herron's spy novel series (Slow Horses, 2010, through Clown Town, 2025) about disgraced MI5 agents under Jackson Lamb, adapted as Apple TV+'s Slow Horses starring Gary Oldman.

Sloughi (سلوقي)

The Sloughi (سلوقي), or Berber Greyhound, is an ancient sighthound breed from North Africa, where Berber and Bedouin peoples used it to course game over desert terrain.

Oct 21, 2026

Slovacko

Slovacko (1.FC Slovácko) is a Czech First League football club from Uherské Hradiště, Moravia, formed in 2000 by merger as 1.FC Synot; Czech Cup winner 2022, Conference League group stage 2022/23.

Slovak Academy of Sciences

The Slovak Academy of Sciences (Slovak: Slovenská akadémia vied, abbreviated SAV) is Slovakia's national, non-university research institution, established in 1953 under Czechoslovakia and headquartered in Bratislava, where it runs dozens of research institutes.

Slovak Armed Forces

Slovak Armed Forces (Ozbrojené sily SR), the military of Slovakia, established 1 January 1993, fully professional, NATO member since 2004, shrank from 50,000 to 14,100 personnel, now modernizing with CV90s, F-16s, and BARAK MX air defense.

Oct 21, 2026

Slovak Karst (Slovenský Kras) Biosphere Reserve

Slovak Karst (Slovenský Kras) Biosphere Reserve: UNESCO MAB site designated 1 March 1977, the first in Slovakia; 74,500 ha of plateau karst in south-eastern Slovakia, overlapping the 1995 Aggtelek-Slovak Karst World Heritage caves and Domica Ramsar site.

Oct 10, 2026

Slovak koruna

The Slovak koruna (Sk, ISO code SKK) was the currency of Slovakia from 1993 to 2008, divided into 100 halierov and replaced by the euro in 2009.

Slovak language

Slovak (slovenčina) is the official West Slavic language of Slovakia with about 5.6 million speakers. It was codified by Bernolák in 1787 and by Štúr in the 1840s; today four Ministry of Culture handbooks define the standard.

Slovak Modernism

Slovak Modernism (Slovenská moderna) is a literary and artistic movement in Slovakia from roughly 1900 to 1918, in which writers replaced national themes with subjective motifs, new verse forms, and symbols.

Slovak National Council (1848)

The Slovak National Council of 1848 (Slovenská národná rada) was the first national representative body of the Slovaks, constituted in Vienna on 16 September 1848 and proclaimed at Myjava.

Slovak National Revival

The Slovak National Revival was a Slovak national movement in the Kingdom of Hungary, roughly 1780 to 1848, that codified the Slovak literary language and built modern Slovak identity.

Slovak National Uprising

The Slovak National Uprising (Slovenské národné povstanie, SNP) was an armed insurrection of the Slovak resistance against German occupation, fought from 29 August to 27 October 1944 with more than 80,000 soldiers.

Slovak orthography

Slovak orthography (slovenský pravopis) is the codified spelling system of standard Slovak, governed by Pravidlá slovenského pravopisu since 1931, reformed in 1953, currently in its 2013 fourth edition, approved by the Ministry of Culture.

Slovak People's Party

Slovak People's Party (Hlinka's Slovak People's Party, HSĽS), Slovak Catholic nationalist party founded by priest Andrej Hlinka (Žilina, 1913; origins 1905); ruled wartime Slovak State under Tiso 1939–1945, ran the Hlinka Guard, deported Slovak Jews, and was banned after 1945.

Slovak Republic (1939–1945)

Slovak Republic (Slovenská republika), First Slovak Republic or Slovak State: client state of Nazi Germany, 14 March 1939 to 8 May 1945, under Jozef Tiso, marked by collaboration, the Holocaust, and the 1944 uprising.