Group 4 may refer to:
*
Group 4 element
Group 4 is the second group of transition metals in the periodic table. It contains the four elements titanium (Ti), zirconium (Zr), hafnium (Hf), and rutherfordium (Rf). The group is also called the titanium group or titanium family after its lig ...
, chemical element classification
*
Group 4 (racing)
The Group 4 racing class referred to regulations for cars in sportscar racing, GT racing and rallying, as regulated by the FIA. The Group 4 class was replaced by Group B for the 1983 season.
Production requirements
Prior to 1966, the FIA's Gr ...
, classification for cars in auto racing and rallying
*
G4S
G4S is a British Multinational corporation, multinational private security company headquartered in London, England. The company was set up in 2004 when London-based Securicor amalgamated with Danish firm Group 4 Falck. The company offers a ran ...
, formerly Group 4 Securicor, a prominent British security company
*
IB Group 4 subjects, subject group for the experimental sciences in the International Baccalaureate program
*
Group 4 image format, Group 3 & Group 4 are digital technical standards for image compressing and sending in faxes, and in the Tagged Image File Format (TIFF)
*
Group of Four, the Group of Four (also known as G4) is a coalition of Brazil, Germany, India and Japan, who seek to reform membership in the United Nations Security Council
*
Group 4 (company), a defunct British security company
*"Group Four", a song from Massive Attack's album,
''Mezzanine''
{{disambig