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An email address identifies an email box to which email messages are delivered. A wide variety of formats were used in early email systems, but only a single format is used today, following the specifications developed for Internet mail systems since the 1980s. This article uses the term email address to refer to the addr-spec defined in RFC 5322, not to the address that is commonly used; the difference is that an address may contain a display name, a comment, or both.

An email address such as John.Smith@example.com is made up of a local-part, an @ symbol, then a case-insensitive domain. Although the standard requires the local part to be case-sensitive, it also urges that receiving hosts deliver messages in a case-independent fashion, e.g., that the mail system at example.com treat John.Smith as equivalent to john.smith; some mail systems even treat them as equivalent to johnsmith. Mail systems often limit their users' choice of name to a subset of the technically valid characters, and in some cases also limit which addresses it is possible to send mail to.

With the introduction of internationalized domain names, efforts are progressing to permit non-ASCII characters in email addresses.

Cable 1971, otherwise known as Priority Signal or File 1971 was a high profile and secret military signal communicated in December 1952 between the two main inter-services branches of Pakistan–the Pakistan Army and the Pakistan Navy. It is notable for the fact that it essentially predicted the separation of Pakistan and Bangladesh and by coincidence its title contained the year in which the separation actually happened, almost 20 years later.

The military cable was directed through the Naval Intelligence and Military Intelligence to ISI sent to its headquarter and came in the wake of reactionary of Basic Principles Committee's first report towards the writing of the first set of the Constitution of Pakistan. The cable was sent by then-Commodore S.M. Ahsan to DG ISI Major-General R. Cawthome on a file coincidentally numbered 1971. The cable discussed the implication of One Unit, religious fanaticism, and the economic parity between the West and East Pakistan that will ultimately result in the division of Pakistan into two different groups.

The Cable's message read as:

• The creation of Committee of Ulema to veto the decisions taken in the House of People on religious matters, gives excess of powers to Ulema over the rights of elected representatives of the people. This gives an impression of Pakistan as being a Theocratic State.
• To recommend that the head of the state should be a Muslim will unnecessarily create suspicions in minds of the minorities in Pakistan. The choice to select the head of the state should be left entirely to the people, to select without prejudice to caste, colour and creed.
• It is maintained by same officers that a single House elected on population basis should have been envisaged, and we should cease to think in terms of Bengalis and Punjabis etc. The parity between West & East Pakistan will ultimately result in the division of Pakistan into two different groups, therefore, it is the very negation of one people, one country and one culture.

The cable's message was further extended and discussed at the Army GHQ by MI's officer Major KM Arif when he compiled an "Intelligence Report No. 7894 of the Office of Intelligence Research and Analysis" in December 1970.

The cable is notable for its highlighted title and many historians found strange that the cable was coincidentally numbered: Cable/File 1971.

Garden hermits or ornamental hermits were hermits encouraged to live in purpose-built hermitages, follies, grottoes, or rockeries on the estates of wealthy landowners, primarily during the 18th century. Such hermits would be encouraged to dress like druids and remain permanently on site, where they could be fed, cared for, and consulted for advice, or viewed for entertainment.

Mark DeFriest (born August 18, 1960), known as the Houdini of Florida, is an American man known for his repeated escapes from prison, having successfully done so 7 times. Born in rural Florida, he was arrested for the first time in 1978, serving for a year. In 1980, DeFriest was sentenced to four years in prison for violating probation via illegal firearms possession, having initially been arrested for retrieving work tools that his recently deceased father had willed him before the will had completed probate. His sentence has since been repeatedly extended for having attempted to escape 13 times (including one count of armed robbery during one attempt), as well as collecting hundreds of disciplinary reports for minor infractions, leading to a cumulative stay of 34 years in prison.

DeFriest has cumulatively spent 27 years in solitary confinement. Following publicity, DeFriest was granted parole and released on 5 February 2019. Ten days later, he was rearrested as he checked into a mental health facility.

A lace card is a punched card with all holes punched (also called a whoopee card, ventilator card, flyswatter card, or IBM doily). They were mainly used as practical jokes to cause disruption in card readers. Card readers tended to jam when a lace card was inserted, as the resulting card had too little structural strength to avoid buckling inside the mechanism. Card punches could also jam trying to produce cards with all holes punched, owing to power-supply problems. When a lace card was fed through the reader, a card knife or card saw (a flat tool used with punched card readers and card punches) was needed to clear the jam.

A credit union, a type of financial institution similar to a commercial bank, is a member-owned nonprofit financial cooperative. Credit unions generally provide services to members similar to retail banks, including deposit accounts, provision of credit, and other financial services. In several African countries, credit unions are commonly referred to as SACCOs (Savings and Credit Co-Operatives).

Worldwide, credit union systems vary significantly in their total assets and average institution asset size, ranging from volunteer operations with a handful of members to institutions with hundreds of thousands of members and assets worth billions of US dollars. In 2018, the number of members in credit unions worldwide was 274 million, with nearly 40 million members having been added since 2016.

Leading up to the financial crisis of 2007–2008, commercial banks engaged in approximately five times more subprime lending relative to credit unions and were two and a half times more likely to fail during the crisis. American credit unions more than doubled lending to small businesses between 2008 and 2016, from $30 billion to $60 billion, while lending to small businesses overall during the same period declined by around $100 billion. In the US, public trust in credit unions stands at 60%, compared to 30% for big banks. Furthermore, small businesses are 80% less likely to be dissatisfied with a credit union than with a big bank.

"Natural-person credit unions" (also called "retail credit unions" or "consumer credit unions") serve individuals, as distinguished from "corporate credit unions", which serve other credit unions.

A manhole cover or maintenance hole cover is a removable plate forming the lid over the opening of a manhole, an opening large enough for a person to pass through that is used as an access point for an underground vault or pipe. It is designed to prevent anyone or anything from falling in, and to keep out unauthorized persons and material.

Manhole covers date back at least to the era of ancient Rome, which had sewer grates made from stone.

2024 YR₄ is an asteroid between 40 and 90 metres (130 and 300 ft) in diameter, classified as an Apollo-type (Earth-crossing) near-Earth object. It was discovered by the Chilean station of the Asteroid Terrestrial-impact Last Alert System (ATLAS) on 27 December 2024. As of 5 February 2025, 2024 YR₄ was rated 3 on the Torino scale with a 1 in 53 (1.9%) chance of impacting Earth on 22 December 2032. NASA gives a Palermo Technical Impact Hazard Scale rating of −0.40 for 2024 YR₄, which corresponds to an impact hazard of 39.8% of the background hazard level. The discovery has triggered the first step in planetary defense responses, in which all available telescopes are asked to gather data about the object and United Nations-endorsed space agencies are prompted to begin planning for asteroid threat mitigation.

Preliminary analysis of spectra and photometric timeseries of this asteroid suggests it is a stony S-type or L-type asteroid with a rotation period near 19.5 minutes. The asteroid previously made a close approach of 828,800 kilometres (515,000 miles; 2.156 lunar distances) to Earth on 25 December 2024 (two days before its discovery), and is now moving away from Earth. It will make its next close approach around 17 December 2028. By early April 2025 and until June 2028, 2024 YR₄ will have moved too far away from Earth to be observed by ground-based telescopes. Space-based infrared telescopes such as the James Webb Space Telescope may be able to observe 2024 YR₄ when it is far from Earth.

Memento mori (Latin for 'remember that you [have to] die') is an artistic or symbolic trope acting as a reminder of the inevitability of death. The concept has its roots in the philosophers of classical antiquity and Christianity, and appeared in funerary art and architecture from the medieval period onwards.

The most common motif is a skull, often accompanied by one or more bones. Often this alone is enough to evoke the trope, but other motifs such as a coffin, hourglass and wilting flowers signified the impermanence of human life. Often these function within a work whose main subject is something else, such as a portrait, but the vanitas is an artistic genre where the theme of death is the main subject. The Danse Macabre and Death personified with a scythe as the Grim Reaper are even more direct evocations of the trope.

In economics, shrinkflation is the process of items shrinking in size or quantity, or even sometimes reformulating or reducing quality while their prices remain the same or increase. The word is a portmanteau of the words shrink and inflation. First usage of the term has been attributed to both Pippa Malmgren and Brian Domitrovic.