SP4 may refer to:
* SP4, an album by
Sneaker Pimps
*
Sp4 transcription factor, a human gene
*
Savoia-Pomilio SP.4 __NOTOC__
The Savoia-Pomilio SP.4 was a reconnaissance and bomber aircraft built in Italy during the First World War.Taylor 1989, p.793 It was a further development of the family of designs that had started with the SP.1. Ultimately all of these ...
, a reconnaissance and bomber aircraft built in Italy during the First World War
*
The Saint Patrick's Day Four
The Saint Patrick's Day Four (also, The Saint Patrick's Four, or SP4) are four American peace activists of Irish Catholic heritage who poured their own blood on the walls, posters, windows, and a US flag at a military recruiting center to protest ...
*
Service pack 4
In computing, a service pack comprises a collection of updates, fixes, or enhancements to a software program delivered in the form of a single installable package. Companies often release a service pack when the number of individual patches to a ...
in computing
* Specialist Four (incorrectly called Specialist 4th class), a former enlisted rank of the U.S. Army, now simply
Specialist
Specialist may refer to:
Occupations
* Specialist (rank), a military rank
** Specialist (Singapore)
* Specialist (arena football)
* Specialist degree, in academia
* Specialty (medicine)
* Designated market maker, in the American stock market
* ...
* a model of steam toy made by British manufacturer
Mamod
* a
7.62×42mm silent pistol cartridge
*
Surface Pro 4
The Surface Pro 4 is the fourth-generation Surface-series 2-in-1 detachable, designed, developed, marketed, and produced by Microsoft. The Surface Pro 4 was announced on October 6, 2015 alongside the Surface Book. In the U.S. and Canada, the Su ...
, a laplet by Microsoft
{{Letter-Number Combination Disambiguation