AH meaning in Community ?

Answer:

What is Alternate History mean?

Alternate history (also alternative history, althist, AH) is a genre of speculative fiction of stories in which one or more historical events occur and are resolved differently than in real life. As conjecture based upon historical fact, alternative history stories propose What if? scenarios about crucial events in human history, and present outcomes very different from the historical record. Alternate history also is a subgenre of literary fiction, science fiction, and historical fiction; as literature, alternate history uses the tropes of the genre to answer the What if? speculations of the story.

Since the 1950s, as a subgenre of science fiction, alternative history stories feature the tropes of time travel between histories, and the psychic awareness of the existence of an alternative universe, by the inhabitants of a given universe; and time travel that divides history into various timestreams. In the Spanish, French, German, and Portuguese, Italian, Catalan, and Galician languages, the terms Uchronie, ucronia, ucronía, and Uchronie identify the alternate history genre, from which derives the English term Uchronia, composed of the Greek prefix ου- ("not", "not any", and "no") and the Greek word χρόνος (chronos) "time", to describe a story that occurs "[in] no time"; analogous to a story that occurs in utopia, "[in] no place". The term Uchronia also is the name of the list of alternate-history books, uchronia.net. Moreover, Allohistory (other history) is another term for the genre of alternative history.

reference

Full Form	Category
Abutment Hinge	Academic & Science
Ancient History	Academic & Science
Asteroid Hunt	Academic & Science
Absolute Humidity	Academic & Science
Auditory Hallucinations	Academic & Science
Air Handler	Academic & Science
Agricultural Holding	Academic & Science
algebra AH	Academic & Science
Aunts Husband	Academic & Science
American History	Academic & Science
After Humanity	Academic & Science
Avalon Hill	Business
Art & Humanities	Business
Audit Header	Business
Armor Holdings, Inc.	Business
Americana House	Business
Aryl Hydrocarbon	Chemistry
Apocalyptic Harbinger	Community
Adolf Hitler	Community
Alhamdulillah (Praise to god)	Community
Alternate History	Community
American Hotel	Community
Auction House	Community
After Hijrah	Community
After Hours	Community
Achievement Hunter	Computing
Attribute Hidden	Computing
Address Handling	Computing
Application Header	Computing
Ampere Hours	Electronics
Artificial Harmonic	Electronics
Angel Hair	General
Answer Hello	General
After Hijra	General
The American Herbal	General
Amateur Hours	General
Albert Heijn	General
Used to fill gaps in speaking, when you are searching for words.	General
Hospital Ship (Auxiliary, Hospital)	General
Alert Height (For Category III Operations)	General
Amps High	General
algebras AH	General
Adaptive Hypermedia	General
Alexander Hamilton	General
Amperes hour	General
Ad Honorem	General
Acronym Hell	General
Amp hours	General
Away Home	General
Animal Health	General
All Hemispheres	General
Austria Hungary	General
Alamo Heights	General
Animal Herders	General
Aharon HaLevi	General
Airbus Helicopters	General
Afghan House	General
Ant Hell	General
Abg Haji	General
Andy Hilfiger	General
Alfried Hagedorn	General
Address Header	General
Authenticated Header	General
The Augustinian Hypothesis	General
After The Headache	General
Adrian Hawkins	General
Albert Hein	General
Approximately Homogeneous	General
Axes Handle	General
Ascaris Haemoglobin	General
Alf Hobo	General
Augustus Hamilton	General
Amiable Head	General
Andalusian Horse	General
And Have	General
Another Hundred	General
Angry Hump	General
After Hijrat	General
Alter Herr	General
Alkotmányvédelmi Hivatal	Governmental
Auburn Hills	Governmental
Alpha Industries	Governmental
ACHHNERA JN	Indian Railway Station
Active Hub	Information Technology
Archaeologia Hungarica, Budapesta	International
Asian Highway	International
Anno Hegirae	International
Arithmetical Hierarchy	Maths
Ampere Hour	Measurement Unit
Asthma Health	Medical
Anti-Halation	Medical
Adenomatous Hyperplasia	Medical
Addison Hospital	Medical
Abdominal Hysterectomy	Medical
Arterial Hypertension	Medical
Available and Happy	Messaging
Available Happy	Messaging
Attack Helicopter	Military and Defence
Alert Height	Military and Defence
Authentication Header	Networking
Affordable Housing	Real Estate
Anhui	Regional
Adam Hughes	Society & Culture
Ace of Hearts	Sports
Air Algérie	Transport & Travel
Artificial Horizon	Transport & Travel