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Radio button:

Radio buttons are small round computer graphics used to indicate a fixed number of choices to the user. The user can only select one of the buttons at a time and a dot appears within the one they have selected, clicking on another will remove the dot from the previously selected radio button and place it in the newly selected radio button.

Raster graphic:

A raster graphics image, digital image, or bitmap, is a data file or structure representing a generally rectangular grid of pixels, or points of colour, on a computer monitor, paper, or other display device. The colour of each pixel is individually defined and less colourful images require less information per pixel. Raster graphics are distinguished from vector graphics in that vector graphics represent an image through the use of geometric objects such as curves and polygons (


Rendering is the process of generating an image from a model, by means of a software program. The model is a description of three dimensional objects in a strictly defined language or data structure. It would contain geometry, viewpoint, texture and lighting information. The image is a digital image or raster graphics image. The term may be by analogy with an "artist's rendering" of a scene (


Scale is the ratio between the actual size of an object and its representation. In a GIS it is the ratio between the map being viewed at a particular zoom level and the area represented on the surface of the earth.


Selection is a tool in some software that allows you to target a specific area of an image for some type of manipulation; this can be a pointer arrow, crosshairs, a lasso or a box made of dotted lines (

Server (Web Server):

A server is usually a combination of software and computer(s), supplying a service to client (users') computer and software over a network like the Internet ().


In computer networking, the term server-side refers to operations that are performed by the server in a client-server relationship. Typically, a server is a software program, such as a web server, that runs on a remote server, reachable from a user's local computer or workstation. Operations may be performed server-side because they require access to information or functionality that is not available on the client, or require typical behaviour that is unreliable when it is done client-side. Server-side operations also include processing and storage of data from a client to a server, which can be viewed by a group of clients (


Servlets are small programs that can be added to server software programs to add extra functionality. Examples include "Java servlets" that can be added to web servers ().

Session (Session files):

A session is either a lasting connection using the session layer of a network protocol or a lasting connection between a user (or user agent) and a peer, typically a server, usually involving the exchange of many packets of data between the user's computer and the server (

Shape (File format):

A format for vector data to be used in Geographic Information Systems developed by ESRI. A shape file actually consists of at least three and as many as six files that work together to represent data in a GIS. All of these associated files must have the same name with different extensions. The mandatory three files have the following extensions: shp, shx, dbf. Additional extensions include: sbn,sbx,prj,xml. The shape file can be translated into many other formats and is widely used throughout the GIS industry (


Macromedia Shockwave is frequently confused with Macromedia Flash. Shockwave is Macromedia's first and prior to the advent of Flash also its most successful multimedia player. Shockwave Flash is a dominant multimedia plugin, for web browsers. (

Status bar:

The status bar is an area usually at the bottom of the Graphical User Interface (GUI) of a software application, which displays information about the currently selected command or about an operation in progress (


Sun Microsystems, Inc. is a vendor of computers, computer components, software, and information-technology services, founded in 1982. Sun's products include computer servers and workstations based on its own SPARC and AMD's Opteron processors, the Solaris operating system, the NFS network file system, and the Java platform (