This is a list of some of the terms and abbreviations used.

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256 colours: One of the standard display settings on your PC. Other settings include 16-colour, High Colour (65,536 colours), and True Colour (16.7 million colours).



Animated GIF: A picture file that creates the effect of movement, or animation, when displayed in a Web browser.



Bitmap (BMP): A picture made from a series of small dots that are called pixels. Bitmaps include images created with paint programs, images downloaded from a digital camera, and images scanned into a program with a scanner.

Browser: Computer program for viewing web pages.



Cascading Style Sheets (CSS): An alternative way of defining the appearance of a web page instead of formatting individual paragraphs of text and objects with tags.

Compress: To reduce the size of a file for more efficient storage of information.

Compression: The translation of a file to a more compact form for storage.



DHTML: Dynamic HTML, that allows you to precisely position and move objects in an HTML document.

Digital image: An image that has been scanned or captured electronically with a digital camera.

Document Type Definition (DOCTYPE or DTD): The industry-wide standards for HTML.

Download: To transfer files from a Web server to your PC.



File format: The structure of a file that defines how it is stored and displayed on the screen or in print.

Folder (or directory): Location on your PC's hard drive (or your ISP's server) where files are stored.

Frames: Frames in a web page are like separate panes within a normal Windows window. A master frames page contains the layout information for two or more further HTML pages that are displayed as if they were a single page.

FTP: File Transfer Protocol, means of transferring files to and from a server.



GIF: A file format that supports up to 256 colours and compresses file size without loss of image quality. GIF format works best on line drawings (such as Clip Art) that contain few colours, or on pictures that use large blocks of solid colour.

Grayscale: Images that are composed of shades of black and grey.



Hyperlink: A hot spot on a web page that links to a another HTML page or file on the World Wide Web.

Hypertext Markup Language (HTML): A system of marking up text and graphics that describes the contents and appearance of pages on the World Wide Web.



Image Map: An image with one or more areas that are hyperlinks to other documents.

ISP: Internet Service Provider, the company that provides your Internet access, and whose computer server your website is often located on.



JavaScript: Scripting language originally introduced by Netscape.

JPEG or JPG: A file format that supports up to 16.7 million colours and that compresses photographs for the Web. Some image data is lost in the process of reducing file size.

JScript: The name for Microsoft's version of JavaScript.



Pixels: The unit of measurement on your screen that define the resolution. These units appear as tiny dots. Images created for the Web are often measured in pixels instead of conventional measurements.

PNG: Portable Network Graphics, file format for vector images.



Quirks Mode: Fallback mode for modern browsers to display web pages without a Document Type Definition.



Resolution: The clarity or fineness of detail in an image produced by a monitor or printer.

RGB: A colour-mixing model or method of describing the colours available on a display system. RGB (red, green, blue) mixes percentages of red, green, and blue to get the desired colour.

Rollover button: A button on a Web page that changes in some way when you hover over it or click it with your mouse.

Royalty-free: The absence of a requirement to pay copyright holders for the right to use their images.



Scan: To move a light-sensitive device across an image-bearing surface, such as a page of text, so that it can be interpreted or copied by a computer.

Scanner: An input device that captures photographs or pictures from paper to an electronic format.

Screen resolution: The clarity or fineness of detail in an image produced by a monitor.

Status bar: The horizontal bar along the bottom of the window that displays helpful information.

Stock photo: A high-quality digital photograph created by professional content providers.



Tag: An HTML command that instructs the browser how to display text and images on a web page.

Thumbnail: A miniature version of an image that is generally used to allow quick browsing through multiple images.

TWAIN device: An input device, such as a scanner or digital camera.



Upload: To transfer files from your PC to a Web server, usually by FTP.

URI or URL: Uniform Resource Identity or Uniform Resource Location, a unique web address that includes the protocol, server name, path and the document name.



Vector: A graphical image that is created as a set of mathematically calculated lines, rather than as a set of dots on the screen.



Watermark: A picture that appears lightly in the background of a document or Web page.