In complexity theory the class APX (an abbreviation of "approximable") is the set of NP optimization problems that allow polynomial-time approximation algorithms with approximation ratio bounded by a constant (or constant-factor approximation algorithms for short).
APX Group (APX) is an energy exchange operating the spot markets for electricity in the Netherlands, the United Kingdom, and Belgium.
Vivint, Inc. (formerly known as APX Alarm Security Solutions Inc.) is a private smart home services provider in the United States and Canada.
APXS is also an abbreviation for APache eXtenSion tool, an extension for Apache web servers.
APX may stand for:
The 25 mm Hotchkiss anti-tank gun was a French anti-tank gun that saw service in the first years of the Second World War.
Apple is an American multinational technology company headquartered in Cupertino, California, a suburb of San Jose, that designs, develops, and sells consumer electronics, computer software, and online services.
The apple tree (Malus pumila, commonly and erroneously called Malus domestica) is a deciduous tree in the rose family best known for its sweet, pomaceous fruit, the apple.
Apartheid (ZA pronunciation: /əˈpɑːrteɪd/; Afrikaans: [ɐˈpɐrtɦəit]) was a system of institutionalised racial segregation and discrimination in South Africa between 1948 and 1991, when it was abolished.
Apollo (Attic, Ionic, and Homeric Greek: Ἀπόλλων, Apollōn (GEN Ἀπόλλωνος); Doric: Ἀπέλλων, Apellōn; Arcadocypriot: Ἀπείλων, Apeilōn; Aeolic: Ἄπλουν, Aploun; Latin: Apollō) is one of the most important and complex of the Olympian deities in classical Greek and Roman religion and Greek and Roman mythology.