An abbreviation for Portable Document Format. The PDF format was originally developed to share documents between different operating systems in the late 1980s. Any text document, image or page layout can be saved as a PDF file that includes all of the font information needed to display it without losing quality.
The measure of how easily light passes through a material. It is a quantitative characteristic that can be represented as a number within the range of [0, 1], and in some cases [0%,100%], with lower numbers indicating higher transparency.
The feeling or mood created by a design.
A unit for defining the size of a font. It's not a distance; this unit's measurement is only relative to the typeface's design.
An abstract mark is a type of logo where instead of being a recognizable object from everyday life, it is an abstract geometric form representing a business or brand. Famous examples include the BP starburst logo, and the Pepsi divided circle.
A usability assessment method that is used to evaluate a design against established usability principles or heuristics. It is based on the idea that designers can use their experience to find areas of poor design without extensive user testing.
A type of understanding that is achieved by taking the perspective of another individual. Different people's perspectives often have different needs and values, so empathy can help you understand those differences.
The principle of both sides of an object having a sense of symmetry. It ensures that the weight and visual mass are distributed evenly on both sides of a surface. Balance is more important than symmetry because people don't often notice when something is asymmetrical, but they will always see if something is unbalanced.
A unit of measurement that equals 1/6 of an inch, or 1/72 of a foot.
A process that involves assigning people to work on different parts of the design and making sure that they focus on one area at a time. This method is an excellent way to release products more quickly and with higher quality.
The most common types of agile methods are Scrum, Kanban, XP and Agile Modeling. It can often be difficult for companies to make the switch because it requires significant changes in how product development occurs.
The process of adding game-like qualities to an experience like a website or application. To ensure that these activities are engaging enough for the users, it often includes gradual rewards such as levels and badges systems, which can further encourage engagement with the app.