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Egyptian National Identity Card
The Egyptian National Identity Card (بطاقة الرقم القومي) is the compulsory identity document for Egyptian citizens aged 16 and older, required for hospital care, employment, banking, and property.
Egyptian National Railways
Egyptian National Railways is the state railway operator of Egypt, running a network that was the first railway in Africa and the Middle East, opened in 1856.
Egyptian Natural Gas Holding
Egyptian Natural Gas Holding, known as EGAS, is Egypt's state holding company for natural gas, created in 2001 to manage agreements, exploration, production, and distribution.
EHang
EHang Holdings Limited is a Chinese manufacturer of pilotless electric aircraft in Guangzhou, founded in 2014; its EH216-S holds the world's first passenger eVTOL type certificate.
Ehime Maru and USS Greeneville collision
The Ehime Maru and USS Greeneville collision was a 2001 accident in which a US Navy submarine sank a Japanese training ship off Oahu, killing 9.
Eicher Motors
Eicher Motors Limited is an Indian automobile company headquartered in Chennai, known for Royal Enfield motorcycles and its majority stake in the truck maker VE Commercial Vehicles.
EIDAS
eIDAS, short for Electronic Identification, Authentication and Trust Services, is the 2014 EU regulation making electronic identification, signatures, and other trust services work across borders within the EU.
Eielson Air Force Base
Eielson Air Force Base is a United States Air Force installation about 25 miles south of Fairbanks, Alaska, and home of the 354th Fighter Wing, which flies F-35s.
Eifel Aqueduct
The Eifel Aqueduct (Eifelwasserleitung) was a 95-kilometer Roman aqueduct, built around AD 80, that carried spring water from the Eifel hills to the Roman city of Cologne.
Eiffel (programming language)
Eiffel, also known as the Eiffel language, is an object-oriented programming language designed in 1985 by Bertrand Meyer at Eiffel Software, best known for Design by Contract and standardized as ISO/IEC 25436:2006.
Eiga.com
Eiga.com, also known as 映画.com, is Japan's leading movie information website, launched in August 1998 and fully acquired by the entertainment company GENDA in 2025.
Eigen (C++ library)
Eigen is a header-only C++ template library for linear algebra, started in 2006, providing matrix and vector classes, numerical solvers, and decompositions under the MPL2 license.
Eigenface
An eigenface is an eigenvector reshaped into a face-like image, produced by principal component analysis of face photographs; the method was introduced for face recognition by Turk and Pentland at MIT in 1991.
Eigensystem realization algorithm
The eigensystem realization algorithm (ERA) is a time-domain system identification method developed at NASA's Langley Research Center in 1985 that builds minimum-order state-space models and extracts modal parameters from impulse response data.
Eigenvalue-based spectrum sensing
Eigenvalue-based spectrum sensing is a blind detection method in cognitive radio that detects primary users using covariance matrix eigenvalues, without knowing the signal or noise power.
Eigenvector centrality
Eigenvector centrality is a network measure in which each node's score depends on the scores of the nodes pointing to it, first applied by Edmund Landau in 1895.
Eight Sleep
Eight Sleep is a New York sleep technology company founded in 2014, known for the Pod, a smart mattress cover that heats and cools each side of the bed.
Eihei-ji
Eihei-ji (永平寺), Daihonzan Eihei-ji, is one of two head temples of Sōtō Zen in Japan, founded by Dōgen in 1244 in Fukui Prefecture as Daibutsu-ji, renamed 1246; an active training monastery with about 150 monks and 19 Important Cultural Property buildings.
Eiksund Tunnel
The Eiksund Tunnel is a subsea road tunnel in Møre og Romsdal, Norway, opened in 2008 and the world's deepest undersea road tunnel at 287 m.
Eimco
Eimco, originally the Eastern Iron and Metal Company, was an American manufacturer of underground mining machinery in Salt Lake City, best known for the Rocker Shovel Loader Model 12B.
Einstein Observatory
The Einstein Observatory, originally designated HEAO-2, was a NASA X-ray astronomy satellite launched in 1978 that carried the first fully imaging X-ray telescope into space, operating until 1981.
Einstein Probe
Einstein Probe is a Chinese Academy of Sciences X-ray astronomy satellite launched on January 9, 2024, to discover high-energy transients and monitor variable X-ray sources.
Eipper Quicksilver
The Eipper Quicksilver is a family of American ultralight aircraft that began as a rigid-wing hang glider in the early 1970s at Dick Eipper's Eipper-Formance.
EirGrid
EirGrid is Ireland's state-owned electricity transmission system operator, running the national grid and interconnectors to Great Britain, and jointly operating the Single Electricity Market with SONI.
Eisai
Eisai is a Japanese research-based pharmaceutical company headquartered in Tokyo, founded in 1936, known for Aricept, Lenvima, and Leqembi, an Alzheimer's drug developed with Biogen.
Eisenhower dollar
The Eisenhower dollar, or Ike dollar, is a United States one-dollar coin struck from 1971 to 1978, bearing President Dwight D. Eisenhower and an eagle adapted from the Apollo 11 insignia.
Eisenhower Executive Office Building
The Eisenhower Executive Office Building, formerly the Old Executive Office Building, is a French Second Empire federal office building next to the White House, built between 1871 and 1888.
Eisenhower Tunnel
The Eisenhower Tunnel is the westbound bore of the Eisenhower-Johnson Memorial Tunnel, a dual-bore tunnel on Interstate 70 about 60 miles west of Denver that crosses the Continental Divide.
Eisenmann
Eisenmann is a German plant engineering company based in Böblingen that builds industrial paint shops, conveyor systems, and material flow automation, chiefly for automotive manufacturing.
Eivind Hognestad
Eivind Hognestad was a Norwegian-born American concrete researcher and structural engineer whose 1951 column experiments and Hognestad parabola shaped ultimate-strength design; he was elected to the National Academy of Engineering.