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[[Image:Asynchronouslogicboard.jpg|right|frame|<center>[http://www.electronicsweekly.com/Articles/2005/09/13/36292/asynchronous-logic-born-to-be-wild.htm asynchronouslogicboard]]]

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*[http://en.wikipedia.org/wiki/18th_century 1748]

*[https://en.wikipedia.org/wiki/18th_century 1748]

==Definitions==

==Definitions==

*1: not [[synchronous]]; occurring at [[different]] times

*1: not [[synchronous]]; occurring at [[different]] times

'''Asynchrony''', in the general meaning, is the state of not being [[synchronized]].

'''Asynchrony''', in the general meaning, is the state of not being [[synchronized]].

*[http://en.wikipedia.org/wiki/Asynchronous_learning Asynchronous learning], a student-centered teaching [[method]] that uses online learning resources to [[facilitate]] information [[sharing]] outside the constraints of time and place among a network of people

*[https://en.wikipedia.org/wiki/Asynchronous_learning Asynchronous learning], a student-centered teaching [[method]] that uses online learning resources to [[facilitate]] information [[sharing]] outside the constraints of time and place among a network of people

*[[Collaborative]] editing systems

*[[Collaborative]] editing systems

In specific terms of ''digital logic'' and physical layer of [[communication]], an asynchronous [[process]] does not require a clock signal, in contrast with synchronous and [http://en.wikipedia.org/wiki/Plesiochronous plesiochronous] systems.

In specific terms of ''digital logic'' and physical layer of [[communication]], an asynchronous [[process]] does not require a clock signal, in contrast with synchronous and [https://en.wikipedia.org/wiki/Plesiochronous plesiochronous] systems.

*[http://en.wikipedia.org/wiki/Asynchronous_circuit Asynchronous circuit], is a sequential digitallogic  circuit which is not governed by a clock circuit or global clock signal

*[https://en.wikipedia.org/wiki/Asynchronous_circuit Asynchronous circuit], is a sequential digitallogic  circuit which is not governed by a clock circuit or global clock signal

*[http://en.wikipedia.org/wiki/Asynchronous_system Asynchronous system], has no global clock: instead, it operates under distributed control, with concurrent hardware components communicating and synchronizing on channels

*[https://en.wikipedia.org/wiki/Asynchronous_system Asynchronous system], has no global clock: instead, it operates under distributed control, with concurrent hardware components communicating and synchronizing on channels

*[http://en.wikipedia.org/wiki/Asynchronous_serial_communication Asynchronous communication], transmission of data without the use of an external clock signal, where data can be transmitted intermittently rather than in a steady stream

*[https://en.wikipedia.org/wiki/Asynchronous_serial_communication Asynchronous communication], transmission of data without the use of an external clock signal, where data can be transmitted intermittently rather than in a steady stream

*[http://en.wikipedia.org/wiki/Asynchronous_serial_communication Asynchronous serial communication], describes an asynchronous, serial transmission protocol in which a start signal is sent prior to each byte, character or code word and a stop signal is sent after each code word

*[https://en.wikipedia.org/wiki/Asynchronous_serial_communication Asynchronous serial communication], describes an asynchronous, serial transmission protocol in which a start signal is sent prior to each byte, character or code word and a stop signal is sent after each code word

*Asynchronous [http://en.wikipedia.org/wiki/Serial_interface serial interfaces]

*Asynchronous [https://en.wikipedia.org/wiki/Serial_interface serial interfaces]

*[http://en.wikipedia.org/wiki/Asynchronous_cellular_automaton Asynchronous cellular automaton], able to update individual [[cells]] independently, in such a way that the new state of a cell affects the [[calculation]] of states in neighbouring cells

*[https://en.wikipedia.org/wiki/Asynchronous_cellular_automaton Asynchronous cellular automaton], able to update individual [[cells]] independently, in such a way that the new state of a cell affects the [[calculation]] of states in neighbouring cells

At the higher [http://en.wikipedia.org/wiki/Data_link_layer data link layer] of [[communication]], ''asynchrony'' is synonym of [http://en.wikipedia.org/wiki/Statistical_multiplexing statistical multiplexing], such as in [http://en.wikipedia.org/wiki/Packet_mode packet mode]. The information transmission may or may not start immediately as requested by sender, the additional delay being caused by medium [[congestion]]. Contrast with example of circuit switched communication, which (once circuit is established) allows immediate start of transfer with a guaranteed bit rate. Confusingly, a communication is often synchronous at the physical layer, while being asynchronous at the data link layer.

At the higher [https://en.wikipedia.org/wiki/Data_link_layer data link layer] of [[communication]], ''asynchrony'' is synonym of [https://en.wikipedia.org/wiki/Statistical_multiplexing statistical multiplexing], such as in [https://en.wikipedia.org/wiki/Packet_mode packet mode]. The information transmission may or may not start immediately as requested by sender, the additional delay being caused by medium [[congestion]]. Contrast with example of circuit switched communication, which (once circuit is established) allows immediate start of transfer with a guaranteed bit rate. Confusingly, a communication is often synchronous at the physical layer, while being asynchronous at the data link layer.

*[http://en.wikipedia.org/wiki/Asynchronous_Transfer_Mode Asynchronous Transfer Mode], according to the ATM Forum, "a telecommunications concept defined by ANSI and ITU (formerly CCITT) standards for carriage of a complete range of user traffic, including voice, data, and video signals," and is designed to unify telecommunication and computer networks

*[https://en.wikipedia.org/wiki/Asynchronous_Transfer_Mode Asynchronous Transfer Mode], according to the ATM Forum, "a telecommunications concept defined by ANSI and ITU (formerly CCITT) standards for carriage of a complete range of user traffic, including voice, data, and video signals," and is designed to unify telecommunication and computer networks

*[http://en.wikipedia.org/wiki/Packet_switched Packet switched] systems such as Ethernet or IP

*[https://en.wikipedia.org/wiki/Packet_switched Packet switched] systems such as Ethernet or IP

In computer programming, asynchronous events are those occurring independently of the main program flow. Asynchronous actions are actions executed in a non-blocking scheme, allowing the main program flow to continue processing.[1]

In computer programming, asynchronous events are those occurring independently of the main program flow. Asynchronous actions are actions executed in a non-blocking scheme, allowing the main program flow to continue processing.[1]

*Asynchronous I/O, in [[computer science]], is a form of input/output processing that permits other processing to continue before the transmission has finished

*Asynchronous I/O, in [[computer science]], is a form of input/output processing that permits other processing to continue before the transmission has finished

*[http://en.wikipedia.org/wiki/Application_programming_interface Asynchronous application programming] interfaces (APIs)

*[https://en.wikipedia.org/wiki/Application_programming_interface Asynchronous application programming] interfaces (APIs)

*[http://en.wikipedia.org/wiki/Asynchronous_method_dispatch Asynchronous method dispatch ]](AMD), a data communication method used when there is a need for the server side to handle a large number of long lasting client requests

*[https://en.wikipedia.org/wiki/Asynchronous_method_dispatch Asynchronous method dispatch ]](AMD), a data communication method used when there is a need for the server side to handle a large number of long lasting client requests

*[http://en.wikipedia.org/wiki/Ajax_(programming) Ajax (programming)], asynchronous JavaScript and XML

*[https://en.wikipedia.org/wiki/Ajax_(programming) Ajax (programming)], asynchronous JavaScript and XML

In electric motors, an asynchronous motor is a variant where the electromagnetic field turns with a different (higher) speed than the rotor; the difference is called slip.[http://en.wikipedia.org/wiki/Asynchronous]

In electric motors, an asynchronous motor is a variant where the electromagnetic field turns with a different (higher) speed than the rotor; the difference is called slip.[https://en.wikipedia.org/wiki/Asynchronous]

[[Category: Computer Science]]

[[Category: Computer Science]]