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In software, headless refers to computer programs that use textual input/output to interact with users, instead of using graphics
Graphics

Graphics are visual presentations on some surface, such as a wall, canvas, computer screen, paper, or stone to brand, inform, illustrate, or entertain....
 or graphical user interface
Graphical user interface

A graphical user interface is a type of user interface which allows people to human-computer interaction such as computers; hand-held devices such as MP3 Players, Portable Media Players or Gaming devices; household appliances and office equipment....
s (GUI
Gui

Gui or guee is a generic term to refer to grillinged dishes in Korean cuisine. These most commonly have meat or fish as their primary ingredient, but may in some cases also comprise grilled vegetables or other vegetarian ingredients....
s).

In computer hardware
Computer hardware

A personal computer is made up of computer hardware, multiple physical components onto which can be loaded into a multitude of software that perform the functions of the computer....
, headless refers to a server
Server (computing)

A server is a computer program that provides services to other computer programs , in the same or other computer. The physical computer that runs a server program is also often referred to as server....
 with no monitor
Computer display

A visual display unit, often called simply a monitor or display, is a piece of electrical equipment which displays images generated from the video output of devices such as computers, without producing a permanent record....
, graphics card, keyboard
Keyboard (computing)

In computing, a keyboard is an input device, partially modeled after the Typewriter#Keyboard layout, which uses an arrangement of buttons or Push-button, which act as mechanical levers or electronic switches....
, or mouse
Mouse (computing)

In computing, a mouse is a pointing device that functions by detecting dimension motion relative to its supporting surface. Physically, a mouse consists of an object held under one of the user's hands, with one or more buttons....
 attached. Interaction with it depends on the use of a network connection, serial communication, or the use of a "crash cart
Crash cart

A crash cart or code cart is a set of trays on a wheeled cart that is used in hospital wards and emergency rooms. It contains all the basic equipment necessary to follow Advanced cardiac life support/Advanced life support protocols and potentially save someone's life....
."

A headless is also a type of foe encountered in the role-playing universe
Role-playing game

A role-playing game is a game in which the participants assume the roles of fictional characters. Participants determine the actions of their characters based on their characterization, and the actions succeed or fail according to a role-playing game system of rules and guidelines....
 of Ultima.






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In software, headless refers to computer programs that use textual input/output to interact with users, instead of using graphics
Graphics

Graphics are visual presentations on some surface, such as a wall, canvas, computer screen, paper, or stone to brand, inform, illustrate, or entertain....
 or graphical user interface
Graphical user interface

A graphical user interface is a type of user interface which allows people to human-computer interaction such as computers; hand-held devices such as MP3 Players, Portable Media Players or Gaming devices; household appliances and office equipment....
s (GUI
Gui

Gui or guee is a generic term to refer to grillinged dishes in Korean cuisine. These most commonly have meat or fish as their primary ingredient, but may in some cases also comprise grilled vegetables or other vegetarian ingredients....
s).

In computer hardware
Computer hardware

A personal computer is made up of computer hardware, multiple physical components onto which can be loaded into a multitude of software that perform the functions of the computer....
, headless refers to a server
Server (computing)

A server is a computer program that provides services to other computer programs , in the same or other computer. The physical computer that runs a server program is also often referred to as server....
 with no monitor
Computer display

A visual display unit, often called simply a monitor or display, is a piece of electrical equipment which displays images generated from the video output of devices such as computers, without producing a permanent record....
, graphics card, keyboard
Keyboard (computing)

In computing, a keyboard is an input device, partially modeled after the Typewriter#Keyboard layout, which uses an arrangement of buttons or Push-button, which act as mechanical levers or electronic switches....
, or mouse
Mouse (computing)

In computing, a mouse is a pointing device that functions by detecting dimension motion relative to its supporting surface. Physically, a mouse consists of an object held under one of the user's hands, with one or more buttons....
 attached. Interaction with it depends on the use of a network connection, serial communication, or the use of a "crash cart
Crash cart

A crash cart or code cart is a set of trays on a wheeled cart that is used in hospital wards and emergency rooms. It contains all the basic equipment necessary to follow Advanced cardiac life support/Advanced life support protocols and potentially save someone's life....
."

A headless is also a type of foe encountered in the role-playing universe
Role-playing game

A role-playing game is a game in which the participants assume the roles of fictional characters. Participants determine the actions of their characters based on their characterization, and the actions succeed or fail according to a role-playing game system of rules and guidelines....
 of Ultima. They are naked humans, without a head.

The Headless are also NPC's found in the first low level Exile hideout in the role-playing universe
Role-playing game

A role-playing game is a game in which the participants assume the roles of fictional characters. Participants determine the actions of their characters based on their characterization, and the actions succeed or fail according to a role-playing game system of rules and guidelines....
 of The Matrix Online
The Matrix Online

'The Matrix Online' is a massively multiplayer online game developed by Monolith Productions. It is an official continuation of the The Matrix ....
. These are clothed, human looking programs with no heads.

In warfare, "decapitation" is converted into a metaphor for rendering an organization -- a state, an army, or a smaller military unit -- "headless" by capturing, killing, or isolating its leadership.

The two literal senses of headlessness, that give rise to the metaphors and enumerated above, are absences of the head in a species where one is normal:
  • rare results of abnormal prenatal development, in humans including
    • acrania
      Acrania

      Acrania is a cephalic disorder of a human fetus characterised by a partial or complete absence of the cranium. The condition is frequently, though not always, associated with anencephaly....
      , where a skull
      Skull

      The skull is a bone structure found in the head of many animals. The skull supports the structures of the face and protects the head against injury....
       is lacking and survival is short, and
    • acephaly
      Acephaly (medicine)

      Acephaly is a type of cephalic disorder. It literally means absence of the head. It is a much rarer condition than anencephaly. The acephalic fetus is a parasitic twin attached to an otherwise intact fetus....
      , where a headless (and heartless) lower body can live if not detached from the body of its more normal twin
  • decapitation
    Decapitation

    Decapitation , or beheading, is the cutting off of the head of a person or animal. Beheading typically refers to the act of intentional decapitation, e.g., as a means of murder or capital punishment; it may be accomplished, for example, with an axe, sword, knife, wire, or by means of a guillotine....
    , the severing of the whole head from the body, which leads, in complex-brained animals (the most familiar being the chordate
    Chordate

    Chordates are a group of animals that includes the vertebrates, together with several closely related invertebrates. They are united by having, at some time in their life cycle, a notochord, a hollow dorsal nerve cord, pharyngeal slits, an endostyle, and a post-anal tail....
    s and arthropod
    Arthropod

    Arthropods are animals belonging to the Scientific classification Arthropoda , and include the insects, arachnids, crustaceans, and others....
    s, and some of the mollusc
    Mollusca

    MolluscsSpelled mollusk in the USA; the spelling "mollusc" is preferred by some authors, see the reasons given by . are animals belonging to the Phylum Mollusca....
    s)
    • quick death of the brain for loss of blood circulation
      Circulatory system

      The circulatory system is an organ that moves nutrients, gases, and wastes to and from cells to help fight diseases and help stabilize body temperature and pH to maintain homeostasis....
      , and
    • (sometimes slower) death of the headless body, by massive loss of blood volume
      Bleeding

      Bleeding, technically known as hemorrhaging or haemorrhaging is the loss of blood from the circulatory system. Bleeding can occur internally, where blood leaks from blood vessels inside the body or externally, either through a natural opening such as the vagina, Mouth , nose, or anus, or through a break in the skin....
      , and failure of respiration in the absence of appropriate stimuli from the brain, but the possibility of activity (such as walking or running) coordinated by neural
      Neuron

      Neurons are responsive cell in the nervous system that process and transmit information by electrochemical Signal . They are the core components of the brain, the vertebrate spinal cord, the invertebrate ventral nerve cord, and the peripheral nerves....
       ganglia
      Ganglion

      In anatomy, a ganglion is a biological tissue.Cells found in a ganglion are called ganglion cells, though this term is also sometimes used to refer specifically to Retinal ganglion cells....


See also

  • Blemmyes
    Blemmyes

    The Blemmyes were a nomadic Nubian tribe described in Ancient Rome histories of the later empire. From the late third century on, along with another tribe, the Nobatia, they repeatedly fought the Romans....
    , headless humanoid creatures
  • The Headless Horseman
    The Headless Horseman

    The Headless Horseman is a fictional character from the short story The Legend of Sleepy Hollow by American author Washington Irving....
  • Mike the Headless Chicken
    Mike the Headless Chicken

    Mike the Headless Chicken was a Wyandotte rooster that lived for 18 months after its head had been cut off. Thought by many to be a hoax, the bird was taken by its owner to the University of Utah in Salt Lake City to establish its authenticity....
     (non-fiction)
  • The philosophy of Douglas E. Harding
    Douglas Harding

    Douglas Edison Harding was an English mystic, philosopher and author.Harding developed a modern method of meditation that sought to enable participants to see who they really are....


Category:Out-of-band management