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Mercury-Redstone 3
Mercury-Redstone 3, also known as Freedom 7, was the first United States human spaceflight, launched May 5, 1961, carrying Alan Shepard on a 15-minute suborbital flight.
Mercury-Redstone 4
Mercury-Redstone 4, known as Liberty Bell 7, was the second and final crewed Project Mercury suborbital flight, launched July 21, 1961, carrying Gus Grissom; the capsule sank after splashdown but was recovered in 1999.
Mercury(II) fulminate
Mercury(II) fulminate, or fulminate of mercury, is a gray-white crystalline primary explosive that detonates from a sharp blow and was long the standard charge in percussion and blasting caps.
Mercy-class hospital ship
The Mercy class is a pair of United States Navy hospital ships, USNS Mercy and USNS Comfort, converted from oil tankers into 1,000-bed floating hospitals in the 1980s.
Merdeka 118
Merdeka 118, also known as Warisan Merdeka or Menara Warisan Merdeka, is a 678.9-meter, 118-storey skyscraper in Kuala Lumpur, inaugurated in 2024 and the world's second-tallest building.
Merdeka Palace
Merdeka Palace (Istana Merdeka, meaning Independence Palace) is the official residence and office of Indonesia's president in central Jakarta, built by the Dutch between 1873 and 1879.
Meredith Gourdine
Meredith Gourdine was an American engineer and physicist who pioneered electrogasdynamics, converting ionized gas flow into electricity, and won Olympic long jump silver in 1952.
Meren Energy
Meren Energy, formerly Africa Oil Corp., is a Canadian oil and gas company with producing deepwater fields offshore Nigeria and interests in Namibia and South Africa.
Merge sort
Merge sort is a divide-and-conquer, comparison-based sorting algorithm that recursively sorts halves and merges them, with a guaranteed O(n log n) worst case and stable output.
Merge tree
A merge tree is a topological data analysis structure that records how the connected components of a scalar function's sublevel sets merge as the threshold value rises.
Mergekit
MergeKit is an open-source toolkit for model merging, combining fine-tuned model weights into a single multitask model by arithmetic alone, created by Charles Goddard in 2023.
Merging unit
A merging unit (MU) is a device in a digital substation that converts analog currents and voltages from instrument transformers into digitized IEC 61850 Sampled Values streams.
Meridian Speedway (rail line)
The Meridian Speedway is a 320-mile freight rail corridor from Meridian, Mississippi, to Shreveport, Louisiana, forming the eastern portion of the rail route between Dallas and Meridian.
Merit Network
Merit Network is an independent nonprofit owned by Michigan's public universities, founded in 1966 and best known for managing the NSFNET backbone, the precursor to the modern Internet.
Meritum
Meritum was an 8-bit personal computer produced in the 1980s by the Mera-Elzab factory in Zabrze, Poland, and was the first Polish personal computer to reach serial production, about 2,500 units between 1984 and 1986.
Merkava (מרכבה)
The Merkava (מרכבה, "chariot") is a main battle tank designed and built in Israel for the Israel Defense Forces, first fielded in 1979 under Major General Israel Tal.
Merkle tree
A Merkle tree, also called a Merkle hash tree, is a hash-based binary tree, introduced by Ralph Merkle in 1979, whose root hash tamper-evidently commits to a dataset.
Merkur
Merkur was a short-lived Ford brand of the Lincoln-Mercury division that sold the German-built XR4Ti coupe and Scorpio sedan in the US and Canada from 1985 to 1989.
Merkur XR4Ti
The Merkur XR4Ti was a three-door sporty hatchback sold in the US and Canada from 1985 to 1989, a federalized Ford Sierra XR4i with a turbocharged four-cylinder engine.
Mermaid (software)
Mermaid is a JavaScript-based diagramming tool, created by Knut Sveidqvist and first released in 2014, that renders Markdown-inspired text definitions into SVG diagrams in the browser.
Mermer
Mermer is the name of a reported munition for which no open source establishes a developer, classification, or specifications, so specific claims about it remain unconfirmed.
Mero (company)
MERO ČR, a.s. is the Czech state-owned operator of the country's crude oil pipeline and storage infrastructure, founded in 1994 and 100% owned by the Czech Ministry of Finance.
Mero Oil Field
Mero (Campo de Mero) is a giant ultra-deepwater oil field in the pre-salt Santos Basin, about 180 km off Rio de Janeiro, discovered in 2010 and operated by Petrobras.
Meroitic iron production
Meroitic iron production was the smelting and working of iron at Meroe in Sudan, capital of the Kingdom of Kush, practiced for over 1,000 years with bloomery furnaces.
Merom Generating Station
Merom Generating Station is a two-unit, 1,080 MW coal-fired power plant in Sullivan County, Indiana, built by Hoosier Energy and sold to Hallador Energy in 2022.
Merops (weapon)
Merops is an American counter-drone system by Perennial Autonomy that launches AI-guided interceptor aircraft from a pickup truck, used by Ukrainian forces against Russian drones since 2024.
Merowe Dam
The Merowe Dam is a hydropower dam on the Nile River at the fourth cataract in northern Sudan, completed in 2009 with a capacity of 1,250 MW.
Merrell
Merrell is an American footwear brand specializing in hiking boots, trail running shoes, and outdoor footwear, founded in 1981 and owned by Wolverine World Wide since 1997.
Merrill Skolnik
Merrill Skolnik (1927–2022) was an American radar researcher who led the U.S. Naval Research Laboratory's Radar Division for over 30 years and wrote Introduction to Radar Systems.
Merritt Parkway
The Merritt Parkway is a 37.5-mile limited-access parkway carrying Connecticut Route 15 across Fairfield County, completed in 1940 and known for its Art Deco bridges.