AB, Ab, or ab may refer to:
Abortion is the ending of a pregnancy by removal or expulsion of an embryo or fetus before it can survive outside the uterus.
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.
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), and also capital of the Emirate of Abu Dhabi, the largest of the UAE's seven emirates.
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.
The Abbasid Caliphate ( or Arabic: ٱلْخِلافَةُ ٱلْعَبَّاسِيَّة, al-Khilāfatu al-ʿAbbāsiyyah) was the third of the Islamic caliphates to succeed the Islamic prophet Muhammad.
Abkhazia ( (listen), ;) is a de facto and partially recognized republic on the eastern coast of the Black Sea, south of the Greater Caucasus mountains, in northwestern Georgia.
Abdullah II bin Al-Hussein (Arabic: عبدالله الثاني بن الحسين, ʿAbdullāh ath-thānī bin Al-Ḥusayn, born 30 January 1962) has been King of Jordan since 1999. He belongs to the Hashemite family, who have ruled Jordan since 1921 and claim agnatic descent from Muhammad's daughter Fatimah.
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.