AB, Ab, or ab may refer to:
During the war in Iraq that began in March 2003, personnel of the United States Army and the Central Intelligence Agency committed a series of human rights violations against detainees in the Abu Ghraib prison in Iraq.
Abiy Ahmed Ali (Amharic: ዐቢይ አህመድ አሊ [ʔa.bij ʔah.mɛd ʔa.li], Oromo: Abiyyii Ahimad Alii; born 15 August 1976) is an Ethiopian politician serving as the fourth prime minister of the Federal Democratic Republic of Ethiopia since 2 April 2018. He is chairman of both the ruling Ethiopian People's Revolutionary Democratic Front (EPRDF) and the Oromo Democratic Party (ODP), which is one of the four coalition parties of the EPRDF.
Abortion is the ending of a pregnancy by removal or expulsion of an embryo or fetus before it can survive outside the uterus.
Abu Dhabi (US: , UK: ; Arabic: أَبُو ظَبِي Abū Ẓabī Arabic pronunciation: [ɐˈbuˈðˤɑbi]) is the capital and the second most populous city of the United Arab Emirates (the most populous being Dubai).
The Abbasid Caliphate ( or Arabic: ٱلْخِلَافَة ٱلْعَبَّاسِيَّة, al-Khilāfah al-ʿAbbāsīyah) was the third of the Islamic caliphates to succeed the Islamic prophet Muhammad.
The Abrahamic religions, also referred to collectively as Abrahamism, are a group of Semitic-originated religious communities of faith that claim descent from the Judaism of the ancient Israelites and the worship of the God of Abraham.
ABBA (Swedish pronunciation: [²abːa]) are a Swedish pop group formed in Stockholm in 1972 by Agnetha Fältskog, Björn Ulvaeus, Benny Andersson, and Anni-Frid Lyngstad.