** The Nielsen – Schreier theorem, that every subgroup of a free group is free.

** Carefree means " free from care or anxiety.

** Carefree means ' free from care or anxiety '.

** Mini Zork I: The Great Underground Empire ( 1987, Marc Blank & Dave Lebling, free cut-down, single load tape version of game, covermounted on UK's ZZAP! 64 magazine )

** Freeview digital free satellite with a dozen SD channels, with SD feeds of the terrestrial HD freeview channels.

** Sex drive is dependent on androgen levels only in the presence of estrogen, but without estrogen, free testosterone level actually decreases sexual desire ( instead of increases sex drive ), as demonstrated for those women who have hypoactive sexual desire disorder, and the sexual desire in these women can be restored by administration of estrogen ( using oral contraceptive ).

** Webs ( web hosting ), a website which allows users to create free websites

** Raid at Cabanatuan: 121 American soldiers and 800 Filipino guerrillas free 813 American POWs from the Japanese-held camp at Cabanatuan City, Philippines.

** Cold War: East Germany holds its first free elections.

** Gulf War: The United Nations Security Council passes UN Security Council Resolution 678, authorizing military intervention in Iraq if that nation does not withdraw its forces from Kuwait and free all foreign hostages by Tuesday, January 15, 1991.

** Entebbe Raid: Israeli airborne commandos free 103 hostages being held by Palestinian hijackers of an Air France plane at Uganda's Entebbe Airport ; 1 Israeli soldier and several Ugandan soldiers are killed in the raid.

** The first free parliamentary elections are held in Poland.

** Kidnappers in Lebanon set Anglican Church envoys Terry Waite and Thomas Sutherland free.

** First free flight of Igor Sikorsky's Vought-Sikorsky VS-300 helicopter.

** Vietnam War – Operation Ivory Coast: A joint Air Force and Army team raids the Son Tay prison camp in an attempt to free American POWs thought to be held there ( no Americans are killed, but the prisoners have already moved to another camp ; all U. S. POWs are moved to a handful of central prison complexes as a result of this raid ).

** In Chipping Norton, England rioters attempt to free the Ascott Martyrs – sixteen women sentenced to imprisonment for attempting to dissuade strikebreakers.

** The Soviet manned space mission Soyuz 18a ends in failure during its ascent into orbit when a critical malfunction occurs in the second and third stages of the booster rocket during staging, resulting with the cosmonauts and their Soyuz spacecraft having to be ripped free from the vehicle.

** Brazil holds the second round of its first free election in 29 years ; Fernando Collor de Mello wins.

** Richard Stallman, American free software proponent

** 86 free African American colonists sail from New York City to Freetown, Sierra Leone.

** The Dutch were for free trade, while industries in Belgium called for the protection of tariffs.

** GnuTLS, free software implementation of the SSL and TLS protocols

** admitted California as a free state

** The Cartesian product of any family of nonempty sets is nonempty.

** König's theorem: Colloquially, the sum of a sequence of cardinals is strictly less than the product of a sequence of larger cardinals.

** Tychonoff's theorem stating that every product of compact topological spaces is compact.

** In the product topology, the closure of a product of subsets is equal to the product of the closures.

** Khoa, dairy product used in Indian cuisine

** Specification – specifying requirements of a design solution for a product ( product design specification ) or service.

** dot product,

** cross product,

** Hadamard product,

** Kronecker product.

** Wedge product or exterior product

** Interior product

** Outer product

** Tensor product

** the Cartesian product of sets,

** the product of groups, and also the semidirect product, knit product and wreath product,

** the product of rings,

** The additive groups of R and C are isomorphic.

** the classical Lie groups, namely the simple groups related to the projective special linear, unitary, symplectic, or orthogonal transformations over a finite field ;

** the exceptional and twisted groups of Lie type ( including the Tits group ).

** 4 quad characters ; groups of four characters displayed in a row

** Functional groups

** Major climate groups

** Publics – groups of individuals

** The public ( a. k. a. " the general public ") – the totality of such groups.

** The self-description of many Salafi and Wahhabi groups

** Finite groups

** Polycyclic groups

** Negatively curved groups

** Euclidean groups

** Coxeter groups

** Braid groups

** Geometrically finite groups

** Finitely presented simple groups.

** Fundamental groups of closed orientable two-dimensional manifolds.

** In 1999, the North Atlantic Treaty Organization ( NATO ) led by the United States launched air attacks against Yugoslavia ( then composed of only Serbia and Montenegro ) to pressure the Yugoslav government to end its military operations against ethnic Albanian separatists in Kosovo due to accusations of war crimes being committed by Yugoslav military forces working alongside nationalist Serb paramilitary groups.

** Civil war in Chad ( 2005 – present ) – involved Chadian government forces and several Chadian rebel groups.

** Fosse Ardeatine massacre: 335 Italians are killed, including 75 Jews and over 200 members of the Italian Resistance from various groups, in Rome.

** The United States places an embargo on Libyan oil imports, alleging Libyan support for terrorist groups.