Context: A disk operating system (abbreviated DOS) is a computer operating system that can use a disk storage device, such as a floppy disk, hard disk drive, or optical disc. A disk operating system must provide a file system for organizing, reading, and writing files on the storage disk. Strictly speaking, this definition does not apply to current generations operating systems, such as versions of Microsoft Windows in use, while this definition is actually only used for older generations of operating systems., MS-DOS (; acronym for "Microsoft Disk Operating System") is a discontinued operating system for x86-based personal computers mostly developed by Microsoft. It was the most commonly used member of the DOS family of operating systems, and was the main operating system for IBM PC compatible personal computers during the 1980s and the early 1990s, when it was gradually superseded by operating systems offering a graphical user interface (GUI), in various generations of the graphical Microsoft Windows operating system by Microsoft Corporation., DR-DOS (DR DOS, without hyphen up to and including version 6.0) is an operating system of the DOS family, written for IBM PC-compatible personal computers. It was originally developed by Gary Kildall's Digital Research and derived from Concurrent PC DOS 6.0, which was an advanced successor of CP/M-86. As ownership changed, various later versions were produced with names including Novell DOS and Caldera OpenDOS., The United States Army Air Forces (USAAF or AAF) was the military aviation service of the United States of America during and immediately after World War II, successor to the United States Army Air Corps and the direct predecessor of the United States Air Force. The AAF were a component of the United States Army, which in 1942 was divided functionally by executive order into three autonomous forces: the Army Ground Forces, the Services of Supply (which in 1943 became the Army Service Forces), and the Army Air Forces. Each of these forces had a commanding general who reported directly to the Army Chief of Staff., Sierra Entertainment (previously Sierra On-Line, commonly referred to as Sierra) is an American publisher founded in 1979 as On-Line Systems by Ken and Roberta Williams. Based in Oakhurst, California and later in Fresno, California, the division is now owned by Activision, a subsidiary of Activision Blizzard., Aces of the Pacific is a combat flight simulator game developed by Dynamix and published by Sierra Entertainment in 1992. The game takes place during World War II. Player can choose single or instant mission, or choose to take a career path in United States Army Air Forces, United States Navy, United States Marines, Imperial Japanese Army or Imperial Japanese Navy. Its success caused Dynamix to create a very similar follow-up "Aces Over Europe" in 1993., The Luftwaffe was the aerial warfare branch of the combined German Wehrmacht military forces during World War II. Germany's military air arms during the First World War, the "Luftstreitkräfte" of the Army and the "Marine-Fliegerabteilung" of the Navy, had been disbanded in May 1920 as a result of the terms of the Treaty of Versailles which stated that Germany was forbidden to have any air force., PTS-DOS is a disk operating system, a DOS clone, developed in Russia by PhysTechSoft., The Reichsmarine ("Navy of the Realm") was the name of the German Navy during the Weimar Republic and first two years of Nazi Germany. It was the naval branch of the "Reichswehr", existing from 1919 to 1935. In 1935, it became known as the "Kriegsmarine", a branch of the Wehrmacht; a change implemented by Adolf Hitler., Nazi Germany is the common English name for the period in German history from 1933 to 1945, when Germany was governed by a dictatorship under the control of Adolf Hitler and the Nazi Party (NSDAP). Under Hitler's rule, Germany was transformed into a fascist state in which the Nazi Party took totalitarian control over nearly all aspects of life. The official name of the state was "Deutsches Reich" from 1933 to 1943 and "Großdeutsches Reich" ("Greater German Reich") from 1943 to 1945. The period is also known under the names the Third Reich and the National Socialist Period (abbreviated as "NS-Zeit"). The Nazi regime came to an end after the Allied Powers defeated Germany in May 1945, ending World War II in Europe., The Holocaust (from the Greek ': "hólos", "whole" and "kaustós", "burnt"), also referred to as the Shoah"' (Hebrew: , "HaShoah", "the catastrophe"), was a genocide in which Adolf Hitler's Nazi Germany and its collaborators killed about six million Jews. The victims included 1.5 million children and represented about two-thirds of the nine million Jews who had resided in Europe. Some definitions of the Holocaust include the additional five million non-Jewish victims of Nazi mass murders, bringing the total to about 11 million. Killings took place throughout Nazi Germany, German-occupied territories, and territories held by allies of Nazi Germany., The , literally "Army of the Greater Japanese Empire", was the official ground-based armed force of the Empire of Japan, from 1871 to 1945. It was controlled by the Imperial Japanese Army General Staff Office and the Ministry of War, both of which were nominally subordinate to the Emperor of Japan as supreme commander of the army and the navy. Later an Inspectorate General of Military (Army) Aviation became the third agency with oversight of the army. During wartime or national emergencies, the nominal command functions of the emperor would be centralized in an Imperial General Headquarters (IGHQ), an ad-hoc body consisting of the chief and vice chief of the Army General Staff, the minister of war, the chief and vice chief of the Naval General Staff, the inspector general of military aviation, and the inspector general of military training., A submarine simulator, or subsim for short, is usually a computer game in which the player commands a submarine. The usual form of the game is to go on a series of missions, each of which features a number of encounters where the goal is to sink surface ships and to survive counterattacks by destroyers. Submarine simulators are notable for the highly-variable pace of the game; it may take hours of simulated time to get into position to attack a well-defended convoy, and sub simulators typically include an option for players to adjust the ratio of real time to simulated time up and down as desired., The Kriegsmarine ("War Navy") was the navy of Nazi Germany from 1935 to 1945. It superseded the "Kaiserliche Marine" (German Imperial Navy) of World War I and the inter-war "Reichsmarine". The "Kriegsmarine" was one of three official branchesalong with the "Heer (Army)" and the "Luftwaffe (Air Force)"of the Wehrmacht, the armed forces of Nazi Germany., The British Empire comprised the dominions, colonies, protectorates, mandates and other territories ruled or administered by the United Kingdom and its predecessor states. It originated with the overseas possessions and trading posts established by England between the late 16th and early 18th centuries. At its height, it was the largest empire in history and, for over a century, was the foremost global power. By 1913, the British Empire held sway over 412 million people, % of the world population at the time, and by 1920, it covered , % of the Earth's total land area. As a result, its political, legal, linguistic and cultural legacy is widespread. At the peak of its power, the phrase "the empire on which the sun never sets" was often used to describe the British Empire, because its expanse around the globe meant that the sun was always shining on at least one of its territories., World War I (WWI or WW1), also known as the First World War, or the Great War, was a global war originating in Europe that lasted from 28 July 1914 to 11 November 1918. More than 70 million military personnel, including 60 million Europeans, were mobilised in one of the largest wars in history. Over nine million combatants and seven million civilians died as a result of the war (including the victims of a number of genocides), a casualty rate exacerbated by the belligerents' technological and industrial sophistication, and the tactical stalemate caused by gruelling trench warfare. It was one of the deadliest conflicts in history, and paved the way for major political changes, including revolutions in many of the nations involved., Total war is warfare that includes any and all civilian-associated resources and infrastructure as legitimate military targets, mobilizes all of the resources of society to fight the war, and gives priority to warfare over non-combatant needs. The American-English Dictionary defines total war as "war that is unrestricted in terms of the weapons used, the territory or combatants involved, or the objectives pursued, especially one in which the laws of war are disregarded.", U-boat is the anglicised version of the German word U-Boot , a shortening of Unterseeboot, literally "undersea boat". While the German term refers to any submarine, the English one (in common with several other languages) refers specifically to military submarines operated by Germany, particularly in the First and Second World Wars. Although at times they were efficient fleet weapons against enemy naval warships, they were most effectively used in an economic warfare role (commerce raiding), enforcing a naval blockade against enemy shipping. The primary targets of the U-boat campaigns in both wars were the merchant convoys bringing supplies from Canada, the British Empire, and the United States to the United Kingdom and (during the Second World War) to the Soviet Union and the Allied territories in the Mediterranean., The Wehrmacht (lit. "defence force") was the unified armed forces of Nazi Germany from 1935 to 1946. It consisted of the "Heer" (army), the "Kriegsmarine" (navy) and the "Luftwaffe" (air force). The designation "Wehrmacht" for Nazi Germany's military replaced the previously used term, "Reichswehr" (191935), and was the manifestation of Nazi Germany's efforts to rearm the nation to a greater extent than the Treaty of Versailles permitted., Hiroshima is perhaps best known as the first city in history to be targeted by a nuclear weapon when the United States Army Air Forces (USAAF) dropped an atomic bomb on the city (and later on Nagasaki) at 8:15 a.m. on August 6, 1945, near the end of World War II., Dynamix, Inc. was an American developer of video games from 1984 to 2001, best known for the flight simulator "Red Baron", the puzzle game "The Incredible Machine", the "Front Page Sports" series, the acclaimed "Betrayal at Krondor," and their online multiplayer game "Tribes"., FreeDOS (formerly Free-DOS and PD-DOS) is a free operating system for IBM PC compatible computers. It intends to provide a complete DOS-compatible environment for running legacy software and supporting embedded systems., In naval terminology, a destroyer is a fast, maneuverable long-endurance warship intended to escort larger vessels in a fleet, convoy or battle group and defend them against smaller powerful short-range attackers. They were originally developed in the late 19th century as a defence against torpedo boats, and by the time of the Russo-Japanese War in 1904, these "torpedo boat destroyers" (TBD) were "large, swift, and powerfully armed torpedo boats designed to destroy other torpedo boats." Although the term "destroyer" had been used interchangeably with "TBD" and "torpedo boat destroyer" by navies since 1892, the term "torpedo boat destroyer" had been generally shortened to simply "destroyer" by nearly all navies by the First World War., Aces of the Deep is a World War II submarine simulator game developed and published by Dynamix for the PC DOS in 1994 . The game was re-released by Sierra On - Line for Windows in 1995 as Command : Aces of the Deep . Aces of the Deep was the last installment of Dynamix 's Aces series , which included the flight simulators Red Baron , Aces of the Pacific , and Aces Over Europe . However , unlike its predecessors , Aces of the Deep simulates a Kriegsmarine U-boat during the World War II. A unique feature was that Aces of the Deep came with a realistic Kriegsmarine War Grid map in which the player used in reference to finding their patrol zones . There is also an extensive in - game manual that covers the development of the U-boat , time - line based maps that show kill - to - loss ratios , and , on the CD - ROM version , video interviews with former German U-boat captains ., World War II (often abbreviated to WWII or WW2), also known as the Second World War, was a global war that lasted from 1939 to 1945, although related conflicts began earlier. It involved the vast majority of the world's nationsincluding all of the great powerseventually forming two opposing military alliances: the Allies and the Axis. It was the most widespread war in history, and directly involved more than 100 million people from over 30 countries. In a state of "total war", the major participants threw their entire economic, industrial, and scientific capabilities behind the war effort, erasing the distinction between civilian and military resources. Marked by mass deaths of civilians, including the Holocaust (in which approximately 11 million people were killed) and the strategic bombing of industrial and population centres (in which approximately one million were killed, and which included the atomic bombings of Hiroshima and Nagasaki), it resulted in an estimated 50 million to 85 million fatalities. These made World War II the deadliest conflict in human history., Betrayal at Krondor is a DOS-based role-playing video game developed by Dynamix and published by Sierra On-Line in the summer of 1993. "Betrayal at Krondor" takes place largely in Midkemia, the fantasy world developed by Raymond E. Feist in his "Riftwar" novels. The game is designed to resemble a book, separated into chapters and narrated in the third-person with a quick-save bookmark feature., DOS , short for "disk operating system", is an acronym used to describe the family of several very similar command-line computer operating systems for x86-based computers: primarily MS-DOS and PC DOS, but also DR-DOS, FreeDOS, ROM-DOS, and PTS-DOS. None of these systems were officially named "DOS", and indeed "DOS" is a general term for disk operating system., The Imperial Japanese Navy (IJN; Kyjitai: Shinjitai: "" or "Nippon Kaigun", "Navy of the Greater Japanese Empire") was the navy of the Empire of Japan from 1868 until 1945, when it was dissolved following Japan's defeat and surrender in World War II. It was controlled by the Imperial Japanese Navy General Staff and the Ministry of the Navy, both of which were nominally subordinate to the Emperor of Japan as supreme commander of the army and the navy. The Japan Maritime Self-Defense Force (JMSDF) was formed after the dissolution of the IJN., Subject: aces of the deep, Relation: publisher, Options: (A) century (B) definition (C) dynamix (D) english (E) europe (F) germany (G) ibm (H) japan (I) microsoft (J) microsoft windows (K) russia (L) sierra entertainment (M) success (N) united states army
Output: sierra entertainment