images may also be displayed with analog CRT technology such as that used in some electronic test equipment, medical monitors, radar displays, laser shows and early video games. Plotters are printers that use vector data rather than pixel data to draw graphics. CGM CGM (Computer Graphics Metafile) is a file format for 2D vector graphics, raster graphics, and text, and is defined by ISO/IEC 8632. All graphical elements can be specified in a textual source file that can be compiled into a binary file or one of two text representations. CGM provides a means of graphics data interchange for computer representation of 2D graphical information independent from any particular application, system, platform, or device. It has been adopted to some extent in the areas of technical illustration and professional design, but has largely been superseded by formats such as SVG and DXF. Gerber format (RS-274X) The Gerber format (aka Extended Gerber, RS-274X) is a 2D bi-level image description format developed by Ucamco. It is the de facto standard format for printed circuit board or PCB software. SVG SVG (Scalable Vector Graphics) is an open standard created and developed by the World Wide Web Consortium to address the need (and attempts of several corporations) for a versatile, scriptable and all-purpose vector format for the web and otherwise. The SVG format does not have a compression scheme of its own, but due to the textual nature of XML, an SVG graphic can be compressed using a program such as gzip. Because of its scripting potential, SVG is a key component in web applications: interactive web pages that look and act like applications. Other 2D vector formats AFDesign (Affinity Designer document) AI (Adobe Illustrator Artwork) — proprietary file format developed by Adobe Systems CDR — proprietary format for CorelDRAW vector graphics editor !DRAW — a native vector graphic format (in several backward compatible versions) for the RISC-OS computer system begun by Acorn in the mid-1980s and still present on that platform today DrawingML — used in Office Open XML documents GEM — metafiles interpreted and written by the Graphics Environment Manager VDI subsystem GLE (Graphics Layout Engine) — graphics scripting language HP-GL (Hewlett-Packard Graphics Language) — introduced on Hewlett-Packard plotters, but generalized into a printer language HVIF (Haiku Vector Icon Format) Lottie — format for vector graphics animation MathML (Mathematical Markup Language) — an application of XML for describing mathematical notations NAPLPS (North