data compression algorithms such as those available for JPEG files. In contrast to the grid format of bitmap images, Vector graphics file formats use geometric modeling to describe an image as a series of points, lines, curves, and polygons. Because the image is described using geometric data instead of fixed pixels, the image can be scaled to any size while retaining "resolution independence", meaning that the image can be printed at the highest resolution a printer supports, resulting in a clear, crisp image. Vector file formats are usually superior in resolution and ease of editing as compared to bitmap file formats, but are not as widely supported by software and are not well-suited for storing pixel-specific data such as scanned photographs. In the early years of electronic clip art, vector illustrations were limited to simple line art representations. However, by the early 2000s, vector illustration tools could produce virtually the same illustrations as bitmap illustration tools, while still providing all of the advantages of vector file formats. The most common vector file format is Adobe's EPS (Encapsulated PostScript) file format. Microsoft has a much simpler, less sophisticated vector file format called WMF (Windows Metafile). The World Wide Web Consortium has developed a new, XML-based vector file format called SVG (Scalable Vector Graphics) and all major modern web browsers - including Mozilla Firefox, Internet Explorer 9, Google Chrome, Opera, and Safari have at least some degree of support for SVG and can render the markup directly. For those with image-editing experience or interest to work with vector file formats, vector clip art provides the most flexible, highest quality images. Image rights All clip art usage is governed by the terms of individual copyrights and usage rights. The copyright and usage rights of a clip art image are important to understand so that the image is used in a legal, permitted way. The three most common categories of image rights are royalty free, rights managed, and public domain. Most commercial clip art is sold with a limited royalty free license which allows customers to use the image for most personal, educational and non-profit applications. Some royalty free clip art also includes limited commercial rights (the right to use images in for-profit products). However, royalty free image rights often vary from vendor to vendor. Some fine art, clip art is still sold on a rights managed basis. However this type of image rights