Abu Nidal (Sabri al-Banna) was regarded as the most dangerous of the Palestinian political leaders. Abu Nidal, whose pseudonym means "father of struggle" (Abu meaning father and Nidal, a secular term, meaning "struggle" or "effort" in Arabic) was primarily active in the 1970s and 1980s in the left-wing of the Palestine Liberation Organization and later the secular/rejectionist front, and was accused by Western and Arab sources of acting as a mercenary for various Arab governments. Most of its targets were Arab politicians, rivals, and activists they felt were soft on the Israeli issue, but Jews, as well as political representatives of Western nations were also targets, especially those involved in the peace process in the Middle East. Notably, ANO enacted a drastically violent policy towards its own members - executing some 600 members and their families in 1987.
The following list has been compiled from a variety of sources. It is not complete and may contain errors. Some of these attacks have been claimed by several groups, some of them by no group, and others may have been falsely claimed by or attributed to Abu Nidal's organization. Especially noteworthy attacks have been marked in bold type.
September 5, 1973: Occupation of the Saudi embassy in Paris, in order to gain the release of Abu Daoud, then imprisoned in Jordan.
November 25, 1973: KLM flight from Beirut to New York and Tokyo hijacked over Iraqi airspace and diverted to Nicosia, Cyprus, then Valletta, Malta. Passengers and crew released. Claimed by the Arab Nationalist Youth Organization.
November 17, 1976: ANO fighters stormed the Intercontinental Hotel in Amman, Jordan, taking several hostages. The hotel was stormed in turn by Jordanaian security forces, and three gunmen, two soldiers and two civilians were killed. The remaining attackers were executed shortly afterwards.
December 1, 1976: Syrian foreign minister Abdul Halim Khaddam is shot and wounded in an attack on his car in Damascus.
December 13, 1976: Foiled attack on the Syrian embassy in Istanbul.
February 6, 1981: Hisham Muheissen, the Jordanian charge d'affairs in Beirut was kidnapped and three of his bodyguards killed by unidentified attackers, later believed to be ANO. Mulheissen was released unharmed 67 days later.
August 29, 1981:1981 Vienna synagogue attack Three men attacked a Vienna synagogue with machine guns. Two civilians were killed and 23 wounded, including 3 policemen. The attackers were arrested and imprisoned.
June 3, 1982: Attempted assassination in London of Shlomo Argov, Israeli ambassador to the United Kingdom. The Israeli government blamed the PLO for the attack, and this was one of the incidents which provoked a large-scale invasion of Lebanon on June 6. Argov was permanently disabled and died of his injuries 21 years later.
1984: Assassination of Jordanian ambassador in India.
1984: Assassination of Jordanian ambassador in Spain.
1984: Assassination of Jordanian ambassador in Italy.
February 8, 1984: The United Arab Emirates' ambassador to France, Khalifa Abdel Aziz al-Mubarak, was assassinated on a Paris street.
March 7, 1984: Three were killed and nine injured in the bombing of a civilian bus in Ashdod, Israel.
March 24, 1984: In Amman, a bomb was found and removed at the Intercontinental Hotel, coinciding with the visit of Queen Elizabeth II to Jordan.
March 28, 1984: British Cultural Attache and British Council representative Kenneth Whitty was assassinated on an Athens street in Greece by a single gunman, coinciding with the start of a European tour of A School For Scandal, to celebrate the British Councils 50th anniversary, which opened in Athens three days later on 31 March.
April 2, 1984: 48 people are wounded by a machine gun attack on a crowded shopping mall in Jerusalem, Israel.
May 24, 1984; Bomb explodes in an Athens restaurant, no one is hurt.
June 5, 1984: Assassination attempt on Israeli diplomat in Cairo, Egypt.
October 4, 1984: A car bomb exploded in the Israeli embassy car park in Nicosia, Cyprus. One person was hurt
October 4, 1984: An Israeli intelligence agent was killed with four other people in an ambush on a Beirut street.
October 26, 1984: The attempted assassination of a senior UAE diplomat in Rome, Italy, leaves him in a coma and a woman bystander dead.
November 28, 1984: Percy Norris, British Deputy High Commissioner in Bombay, India, is shot and killed by an unidentified gunman as he drove through traffic.
November 29, 1984: British Airways' offices in Beirut, Lebanon, are bombed.
November 1984: Attempted assassination of Jordanian diplomat in Greece.
December 26, 1984: Bombing of the home of veteran Fatah and PLO leader Hani al-Hassan (a.k.a. Abu Tariq, Abu al-Hassan), in Amman, Jordan. Uses the name Black September.
December 29, 1984: Assassination in Amman, Jordan of former Hebron mayor and West Bank moderate Fahd Qawasma, who had previously been deported by Israel for alleged incitement to violence; in Amman, Jordan; uses the name Black September.
April 4, 1985: Rocket attack against Jordanian embassy in Italy.
May 1, 1985: An assassination attempt on a Kuwaiti newspaper editor believed to be soft on Israel failed.
July 11, 1985: Eleven people were killed and 90 injured in two large bomb explosions in cafés in Kuwait City. Amongst the dead was the target of the bombings, the head of Kuwait's investigative branch of the police. A third bomb was successfully defused.
July 7, 1985: A yacht carrying French and Belgian Jews was hijacked off the Gaza Strip and sailed to Libya with eight civilian hostages. These people are then used as "bargaining chips" in Libyan dealings with France, and Abu Nidal dealing with Belgium, until they are all released in 1990. Abu Nidal takes responsibility for this act in November 1987 (Silco incident).
July 22, 1985: Failed bombing of the US embassy in Egypt.
July 21, 1985: A Kuwati Airlines office was destroyed in Beirut. No one was hurt.
July 1985: Bombing of the British Airways office in Madrid, Spain. One person was killed, 27 wounded. Near simultaneous attack on ALIA offices nearby, with two wounded.
September 16, 1985: Grenades were thrown into a popular tourist attraction, the Cafe de Paris in Rome, Italy, wounding 38 people.
November 1985:Hijacking of EgyptAir Flight 648 at Malta. Resolved after Egyptiancommandos stormed the plane, slaying 1 of the 3 hijackers, one of which had been killed in an in-flight shootout with a sky marshal, although 58 of the 91 passengers died.
October 7, 1985: Eleven people were injured by a bomb which exploded in a residential building in Jerusalem.
November 20, 1985: Two Palestinians were assassinated in Jordan by ANO because they were apparently associated with Yasser Arafat.
December 19, 1985: A courtroom in Nantes. France was held hostage by a gunman for several hours in a symbolic protest. No one was hurt. 
September 6, 1986: Gunmen stormed the Neve Shalom synagogue in Istanbul, Turkey during the Sabbath. They shot 22 people dead and set fire to the building before being killed in the (possibly deliberate) detonation of a grenade.
February 5, 1988 Two Scandinavian aid workers were kidnapped in Beirut and released a month later.
March 23, 1988: A man fired on a bus in Bombay, India, which was carrying an Alitalia flight crew. One person wounded. Two days later, grenades were discovered and removed from the Saudi Arabian consulate in the city.
May 15, 1988: Simultaneous gun and grenade attacks on the Acropole Hotel and the Sudan Club in Khartoum aimed at Western diplomats and their families. Four Britons, three Americans and two Sudanese killed, 21 people wounded.
May 11, 1988: A large truck bomb explodes close to the Israeli embassy in Nicosia, Cyprus. The driver is one of the three people killed, apparently when an accomplise remotely detonated the device early. 19 people were injured.
July 11, 1988: A car bomb explodes prematurely at a pier in Athens, killing two ANO members. This is followed by an attack on the cruise shipCity of Poros, which leaves nine dead and 98 wounded.
August 20, 1988: 25 people are injured in a hand grenade explosion at a shopping centre in Haifa, Israel.
November 17, 1988: A Swiss Red Cross worker was kidnapped in Sidon, Lebanon, and held for a month before being released unharmed.
January 14, 1991: Assassination in Tunis of Abu Iyad, a top-ranking Fatah leader, who was Arafat's closest aide and the PLO's second-in-command. Also killed is the PLO Western (Israel) Sector commander Abu Hul and one of their bodyguards.
October 29, 1991: A rocket struck the US Embassy compound in Beirut. No one was hurt.