SP3 may refer to:
* sp
3 hybrids, a type of
orbital hybridisation
In chemistry, orbital hybridisation (or hybridization) is the concept of mixing atomic orbitals to form new ''hybrid orbitals'' (with different energies, shapes, etc., than the component atomic orbitals) suitable for the pairing of electrons to f ...
*
Sp3 transcription factor
Sp3 transcription factor, also known as SP3, refers to both a protein and the gene it is encoded by.
This gene belongs to a family of Sp1 related genes that encode transcription factors that regulate transcription by binding to consensus GC- and ...
, a protein and the gene which encodes it
*
Savoia-Pomilio SP.3, a reconnaissance and bomber aircraft built in Italy
* , an armed motorboat
* 1971 SP3 or
3922 Heather
39 may refer to:
* 39 (number)
* one of the years:
** 39 BC
** AD 39
** 1939
** 2039
* ''39'' (album), a 2000 studio album by Mikuni Shimokawa
* '39", a 1975 song by Queen
* "Thirty Nine", a song by Karma to Burn from the album ''Almost Heathen'' ...
, a main-belt asteroid discovered on September 26, 1971
* 1984 SP3 or
3155 Lee, a main-belt asteroid discovered on September 28, 1984
* SP3,
a model of steam toy made by British manufacturer Mamod
*
Service pack 3
Windows XP is a major release of Microsoft's Windows NT operating system. It was released to manufacturing on August 24, 2001, and later to retail on October 25, 2001. It is a direct successor to Windows 2000 for high-end and business users a ...
, for computer software
*
Socket SP3
Socket SP3 is a zero insertion force land grid array CPU socket designed by AMD supporting its Zen-, Zen 2- and Zen 3-based Epyc server processors, launched on June 20, 2017. Because the socket is physically the same size as socket TR4 and sock ...
, a CPU socket for AMD processors
* SP3, a sink in the
Sima Pumacocha
Sima Pumacocha (possibly from Spanish ''sima'' deep and dark cavern/abyss, Quechua ''puma'' cougar, puma, ''qucha'' lake) is a limestone cave located in the Lima Region, Yauyos Province, Laraos District, in central Peru near the village of Larao ...
, a cave in Peru
*
Surface Pro 3
The Surface Pro 3 is the third-generation Surface-series 2-in-1 detachable, designed, developed, marketed, and produced by Microsoft. It originally ran the Windows 8.1 Pro operating system (OS), but the optional upgrade to Windows 10 Pro (OS) o ...
, a 2-in-1 personal computer by Microsoft
{{Letter-NumberCombDisambig