user interface

The user interface, in the industrial design field of human–machine interaction, is the space where interaction between humans and machines occurs. The goal of interaction between a human and a machine at the user interface is effective operation and control of the machine, and feedback from the machine which aids the operator in making operational decisions. Examples of this broad concept of user interfaces include the interactive aspects of computer operating systems, hand tools, heavy machinery operator controls, andprocess controls. The design considerations applicable when creating user interfaces are related to or involve such disciplines asergonomics and psychology. A user interface is the system by which people (users) interact with a machine. The user interface includes hardware (physical) and software (logical) components. User interfaces exist for various systems, and provide a means of: * Input, allowing the users to manipulate a system * Output, allowing the system to indicate the effects of the users' manipulation Generally, the goal of human-machine interaction engineering is to produce a user interface which makes it easy, efficient, and enjoyable to operate a machine in the way which produces the desired result. This generally means that the operator needs to provide minimal input to achieve the desired output, and also that the machine minimizes undesired outputs to the human. With the increased use of personal computers and the relative decline in societal awareness of heavy machinery, the term user interface is generally assumed to mean the graphical user interface, while industrial control panel and machinery control design discussions more commonly refer to human-machine interfaces. Other terms for user interface include human–computer interface (HCI) and man–machine interface (MMI). web interface is the actual part of the browser where you view the web pages on the internetuser interface , thecomputer interaction–human and computer science Inrefers to the graphical, textual and auditory (of a computer program)information the program presents to the user, and the control sequences , movements of computer keyboard (such as keystrokes with the) the user touchscreen , and selections with thecomputer mouse theemploys to control the program. based user interfaces-Webpt (WUI) that acce web user interfaces or which are transmitted web pages input and provide output by generatingprogram. web browser aand viewed by the user using Internet via the, Microsoft .NET ,Adobe Flex,AJAX ,Java Newer implementations utilizetime control in a separate program, -or similar technologies to provide realeliminating the need to refresh a traditional HTML based web browser. servers, servers and networked -Administrative web interfaces for web.control panels computers are often called Two words are used in UI design to describe the different ways in which a user can utilize a product. Modality refers to several alternate interfaces to the same product, while mode describes different states of the same interface. A modality is a path of communication employed by the user interface to carry input and output. Examples of modalities: * Input – computer keyboard allows the user to enter typed text, digitizing tablet allows the user to create free-form drawing * Output – computer monitor allows the system to display text and graphics (vision modality), loudspeaker allows the system to produce sound (auditory modality) The user interface may employ several redundant input modalities and output modalities, allowing the user to choose which ones to use for interaction. A mode is a distinct method of operation within a computer program, in which the same input can produce different perceived results depending of the state of the computer program. For example, caps lock sets an input mode in which typed letters are uppercase by default; the same typing produces lowercase letters when not in caps lock mode. Heavy use of modes often reduces the usability of a user interface, as the user must expend effort to remember current mode states, and switch between mode states as necessary.