| A | B |
| Fluid Layout | The web design’s dimensions are defined in percentages rather than pixels. |
| Em space | It equals 16 px |
| Relative units | Size is set in relation to surrounding elements |
| Absolute units | A specific size |
| Media Query | A CSS specification that allows designers to target styles based on a number of device properties |
| Scalable Vector Graphics (SVG) | Defines vector-based graphics that can be embedded directly into a Web page |
| Vector graphics | Type of graphic that does NOT lose quality when zoomed or resized. |
| Responsive Web Design | Refers to using existing techniques involving flexible grid layout, flexible images, and media |
| Resolution | A simple count of the number of pixels |
| Pixels per Inch | The number of device pixels on a physical surface |