"25 or 6 to 4" is a song written by American musician Robert Lamm, one of the founding members of the band Chicago. It was recorded in 1969 for their second...

A 6-4-4-6 steam locomotive, in the Whyte notation for describing locomotive wheel arrangements, is one with six leading wheels, two sets of four driving...

The 4.6×30mm (designated as the 4,6 × 30 by the C.I.P.) cartridge is a small-caliber, high-velocity, smokeless powder, rebated, bottleneck, centerfire...

The .25 ACP (Automatic Colt Pistol), also known as the .25 Auto, .25 Automatic, or 6.35×16mmSR) is a semi-rimmed, straight-walled centerfire pistol cartridge...

April 25 Sports Club (Korean: 4.25체육단, Sa io ch'eyuktan), shortly 4.25 SC, also known as April 25 National Defence Sports Club (4.25'국방체육단', Sa io ch'eyuktan...

4-6-0 Ten-wheeler which had either a narrow and deep firebox between the driving wheels or a wide and shallow one above. The type is well-suited to high...

Johansson, the 6.5×25mm CBJ has the same functional dimensions as the 9×19mm Parabellum and was designed to produce the same recoil and pressures to allow most...

331 cu in (5.4 L) cu in introduced in 1949, made in three displacements up to 390 cu in (6.4 L); a 390 cu in (6.4 L) introduced in 1963 that grew to 429 cu in...

Retrieved 29 May 2013. Dropped support for export to legacy Word and Excel (version 6.0/95) files. "LibreOffice 5.4: Release Notes". The Document Foundation Wiki...

first Granville number, or S {\displaystyle {\mathcal {S}}} -perfect number. A Golomb ruler of length 6 is a "perfect ruler". 6 is a harmonic divisor number...