all-Harshad numbers. Each natural number divisible by 4 is a difference of squares of two natural numbers, i.e. 4 x = y 2 − z 2 {\displaystyle 4x=y^{2}-z^{2}} ...

the U.S. military would typically use spaces and a capital 'X' – as "4 X 2" or "6 X 4". Four-wheel drive (4WD) refers to vehicles with two axles providing...

Mac OS X Tiger (version 10.4) is the 5th major release of macOS, Apple's desktop and server operating system for Mac computers. Tiger was released to...

Ruhrstahl Ru 344 X-4 or Ruhrstahl-Kramer RK 344 was a wire-guided air-to-air missile designed by Germany during World War II. The X-4 did not see operational...

science fiction television series The X-Files commenced airing on the Fox network in the United States on October 4, 1996, concluding on the same channel...

announced a GPT-4 powered assistant named "Copilot X". The product provides another chat-style interface to GPT-4, allowing the programmer to receive answers...

X-4 Bantam Chuck Yeager Scott Crossfield John McKay Joseph Walker...

4x4 ("Four by four") refers to four-wheel drive. 4x4 or 4×4 may also refer to: 4x4 (1965 film), a Nordic film 4x4 (2019 film), an Argentine-Spanish film...

The Northrop X-4 Bantam is a prototype small twinjet aircraft manufactured by Northrop Corporation in 1948. It had no horizontal tail surfaces, depending...

jestertoogmailcom (2018-04-12). "4.6mm x 30mm PDW". Military Cartridges. Retrieved 2023-03-30. RUAG Ammotec 2.0 g German Army 4.6×30mm Penetrator DM11 cartridge...

Quartets 4 X 4 is a 1980 album by jazz pianist McCoy Tyner, released on the Milestone label. It was recorded in March and May 1980 by Tyner with bassist...

Despicable Me 4 is a 2024 American animated comedy film produced by Universal Pictures and Illumination, and distributed by Universal. It is the sequel...

notation for the classification of steam locomotives by wheel arrangement, 4-4-2 represents a configuration of a four-wheeled leading bogie, four powered...

Persona 4 Golden, was released for PlayStation Vita in 2012. It was later ported to Windows, Nintendo Switch, PlayStation 4, Xbox One, and Xbox Series X/S in...

4-6-4T locomotives, built in September 1914 by MLW and acquired for suburban service. Numbered 1540 to 1545 on the GTR, they were reclassified as X-10-a...

Channel 4 is a British free-to-air public broadcast television channel owned and operated by Channel Four Television Corporation. It is publicly owned...

for PlayStation 4, PlayStation 5, Windows, Xbox One, and Xbox Series X/S. The game is considered to be a spiritual successor to the Left 4 Dead series, and...

The BE-4 (Blue Engine 4) is an oxygen-rich liquefied-methane-fueled staged-combustion rocket engine produced by Blue Origin. The BE-4 was developed with...

The PlayStation 4 (PS4) is a home video game console developed by Sony Interactive Entertainment. Announced as the successor to the PlayStation 3 in February...

The X Factor is a British television music competition to find new singing talent. The fourth series was broadcast on ITV from 18 August 2007 and was...

year are still useful). Another disadvantage is that the 4–4–5 calendar has only 364 days (7 days x 52 weeks), meaning a 53rd week must be added every five...

(2012), Nexus 4, Nexus 10, Nexus 7 (2013), and Hyundai Play X. The first of these three releases, 4.1, was unveiled at Google's I/O developer conference in...

mass spectrometry and X-ray photoelectron spectroscopy have been demonstrated to discriminate finite differences in different C-4 sources. Chemical, morphological...

enough to hold off the new 3 GHz Pentium 4 HT. The Pentium 4 HT's increase to a 200 MHz quad-pumped bus (200 x 4 = 800 MHz effective) greatly helped to...

The IS-4, also known as the Object 701, was a Soviet heavy tank that started development in 1943 and began production in 1946. Derived from the IS-2 and...

PCIe lanes or two GPUs by 8 PCIe lanes each. Additionally, there are now 2 x 4 lane PCIe interfaces, most often used for M.2 storage devices. Whether the...

International Inc., 1997. ISBN 0-9653993-2-X. Proctor, Jon (2019). "TWA's Skyliners: The Martin 2-0-2 and 4-0-4 in TWA Service". The Aviation Historian (29):...

superhero team the X-Men, the fifth mainline installment of the X-Men film series, a sequel to X-Men: The Last Stand (2006) and X-Men: First Class (2011)...

In American football, the 4–4 defense is a defensive alignment consisting of four down linemen and four linebackers. Originally seen as a passing defense...

Windows and Xbox 360 in November 2008 and for Mac OS X in October 2010, and is the first title in the Left 4 Dead series. Set during the aftermath of a zombie...