Three-tier System (other)
Three-tier system may refer to: * Multitier architecture, a client–server architecture in software engineering, typically of three tiers * Three-tier system (alcohol distribution), the system established in the U.S. after the repeal of Prohibition * Three-tier education, structures of schooling in England * First COVID-19 tier regulations in England, 14 October – 5 November 2020 * Second COVID-19 tier regulations in England, 2 December 2020 – 29 March 2021, on 20 December it became four-tier See also *Tier 1 (other) *Tier 2 (other) *Tier 3 (other) *Tier 4 (other) Tier 4 or Tier four may refer to: *Tier 4 COVID restrictions in England under The Health Protection (Coronavirus, Restrictions) (All Tiers) (England) Regulations 2020, the highest level *Level 4 COVID restrictions, in COVID-19 pandemic in Scotland ...

Multitier Architecture
In software engineering, multitier architecture (often referred to as ''n''-tier architecture) is a client–server architecture in which presentation, application processing and data management functions are physically separated. The most widespread use of multitier architecture is the three-tier architecture. ''N''-tier application architecture provides a model by which developers can create flexible and reusable applications. By segregating an application into tiers, developers acquire the option of modifying or adding a specific tier, instead of reworking the entire application. A three-tier architecture is typically composed of a ''presentation'' tier, a ''logic'' tier, and a ''data'' tier. While the concepts of layer and tier are often used interchangeably, one fairly common point of view is that there is indeed a difference. This view holds that a ''layer'' is a logical structuring mechanism for the conceptual elements that make up the software solution, while a ''tier'' ...
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Three-tier System (alcohol Distribution)
The three-tier system of alcohol distribution is the system for distributing alcoholic beverages set up in the United States after the repeal of Prohibition.Mayfield, KendraWeb Wine Sales Still Bottled Up ''Wired'', 31 March 2004. The three tiers are importers or producers; distributors; and retailers. The basic structure of the system is that producers can sell their products only to wholesale distributors who then sell to retailers, and only retailers may sell to consumers. Producers include brewers, wine makers, distillers and importers. The three-tier system is intended to prohibit tied houses and prevent "disorderly marketing conditions." Some states chose to become alcoholic beverage control jurisdictions after Prohibition. In these states, part or all of the distribution tier, and sometimes also the retailing tier, are operated by the state government itself (or by contractors operating under its authority) rather than by independent private entities. The only state with ...
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Three-tier Education
Three-tier education refers to those structures of schooling, which exist in some parts of England, where pupils are taught in three distinct school types as they progress through the education system. Terminology In a three-tier local education authority children begin their compulsory education in a first school or lower school, which caters for children up to the age of 8 or 9. Children then transfer to a middle school, which caters for children from age 9 to age 13 or 14. Following this, children transfer for the remainder of their compulsory education to an upper school or high school, sometimes on into the sixth form. History References to middle schools in publications of the UK Government date back to 1856, and the educational reports of William Henry Hadow mention the concept. It was not until 1963 that a local authority, the West Riding of Yorkshire, first proposed to introduce a middle-school system, with schools spanning ages 5–9, 9–13 and 13–18; one sourc ...
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First COVID-19 Tier Regulations In England
On 14 October 2020, the UK Government abandoned its attempts to control the spread of SARS-CoV-2 by means of piecemeal local regulations and introduced a three-tier approach across England, with legal restrictions varying according to government-defined tiers (referred to in government statements as "Local COVID Alert Levels"). Tier 1 restrictions are referred to as 'Local COVID Alert Level Medium', with tier 2 being 'Local COVID Alert Level High' and tier 3 'Local COVID Alert Level Very High'. The restrictions were enforced by three English statutory instruments, as follows: * "Tier 1": The Health Protection (Coronavirus, Local COVID-19 Alert Level) (Medium) (England) Regulations 2020 (SI 2020/1103) * "Tier 2": The Health Protection (Coronavirus, Local COVID-19 Alert Level) (High) (England) Regulations 2020 (SI 2020/1104) * "Tier 3": The Health Protection (Coronavirus, Local COVID-19 Alert Level) (Very High) (England) Regulations 2020 (SI 2020/1105) These are collectively ...
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Second COVID-19 Tier Regulations In England
The Health Protection (Coronavirus, Restrictions) (All Tiers) (England) Regulations 2020 (SI 2020/1374) is an English emergency statutory instrument that replaced the second lockdown regulations from 2 December 2020. As initially made, it brought back the three-tier legal framework first introduced by the first COVID-19 tier regulations in England (in effect 14 October – 5 November 2020), but with changes to the restrictions within each tier. The regulations were sometimes referred as the "second tier regulations" or the "all tiers regulations". Exceptions to the restrictions on gatherings were initially to be permitted during the Christmas period, defined as 23–27 December 2020. But following a continued rise in infections in London and the South East, parts of those areas were moved up to the highest level, tier 3, on 17 December (ahead of the formal review date) and on 19 December (the formal review date). On 20 December, a new tier 4 was added with restrictions similar ...
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Tier 1 (other)
Tier 1 or Tier One may refer to: * Tier 1 capital, the core measure of a bank's financial strength * Tier 1 network, category of Internet backbone network * Scaled Composites Tier One, a suborbital human spaceflight program * Tier 1 nations in rugby union * WTA Tier I tournaments, a series of elite women's tennis tournaments * Tier 1 visas under the Points-based immigration system (United Kingdom) * Tier 1 – UK Nuclear Site Management & Licensing, nuclear site management licensees * Tier One (military), some highly secretive special forces units in the U.S. * Tier 1 in the First COVID-19 tier regulations in England, the lowest concern * Tier 1 in the Second COVID-19 tier regulations in England, the lowest concern * Tier I, a data center standard * Tier I, in United States vehicle emission standards *In a supply chain, those suppliers who sell to the manufacturer or main customer directly See also * Multitier architecture * Two-tier healthcare * Three-tier system (disambiguatio ...
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Tier 2 (other)
Tier 2 may refer to: * Tier 2 capital, constituents of a bank's capital requirement * Tier 2 network, a type of Internet service provider * Scaled Composites Tier Two, a human spaceflight program * Tier 2 in the First COVID-19 tier regulations in England, the middle level * Tier 2 in the Second COVID-19 tier regulations in England * Tier II, a data center standard * Tier II, in United States vehicle emission standards See also * Two-tier healthcare * Multitier architecture * WTA Tier II tournaments, Women's Tennis Association tennis second-level tournaments * Three-tier system (other) * Tier 1 (other) * Tier 3 (other) * Tier 4 (other) Tier 4 or Tier four may refer to: *Tier 4 COVID restrictions in England under The Health Protection (Coronavirus, Restrictions) (All Tiers) (England) Regulations 2020, the highest level *Level 4 COVID restrictions, in COVID-19 pandemic in Scotland ... * Tier II+, a remotely-piloted, surveillance aircraft { ...
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Tier 3 (other)
Tier 3 may refer to: * Tier 3 (nightclub), in New York, U.S. * Tier 3 of the First COVID-19 tier regulations in England, the highest level * Tier 3 of the Second COVID-19 tier regulations in England * Tier 3 Railway lines in Australia * Tier III, a data center standard * Tier 3 in United States vehicle emission standards See also * Multitier architecture * WTA Tier III tournaments, Women's Tennis Association tennis third-level tournaments * Three-tier system (other) * Tier III- (Tier 3 minus), an unmanned aerial vehicle * Tier 1 (other) * Tier 2 (other) * Tier 4 (other) Tier 4 or Tier four may refer to: *Tier 4 COVID restrictions in England under The Health Protection (Coronavirus, Restrictions) (All Tiers) (England) Regulations 2020, the highest level *Level 4 COVID restrictions, in COVID-19 pandemic in Scotland ...