Graphic designers are expected to be proficient in software programs for image-making, typography and layout. Nearly all of the popular and "industry standard" software programs used by graphic designers since the early 1990s are products of Adobe Systems Incorporated. Adobe Photoshop (a raster-based program for photo editing) and Adobe Illustrator (a vector-based program for drawing) are often used in the final stage. Some designers across the world use CorelDraw. CorelDraw is a vector graphics editor software developed and marketed by Corel Corporation. Open source software used to edit the vector graphis is Inkscape. Primary file format used in Inkscape is Scalable Vector Graphics (SVG). You can import or export the file in any other vector format. Designers often use pre-designed raster images and vector graphics in their work from online design databases. Raster images may be edited in Adobe Photoshop, logos and illustrations in Adobe Illustrator and CorelDraw, and the final product assembled in one of the major page layout programs, such as Adobe InDesign, Serif PagePlus and QuarkXpress.