Analytics is the process of measuring and analyzing data in order to learn what users are doing. Analytics can be used to track what people do on across applications, on social media, or on a certain web page.
Business strategy encompasses all of the actions that bring design to the marketplace. Good business strategy helps organizations balance innovation with risk, and helps UX practitioners sell clients and colleagues on the value of their work.
Content strategy plans for the creation, curation, and maintenance of text, images, audio, and video. It also defines the tone and character of a business, in order to engage specific user groups and achieve business objectives.
Information architecture is the structure behind a well-thought-out application or website. IA results in categorization, schema, mapping, and navigation that is intuitive and user-friendly.
Interaction design is the process of identifying the path a user ought to take, and the most simple, useful actions that will send him or her along that path.
Although "philosophy" often refers to ideas that have stood the test of time, fast-changing technologies create new ideas that deserve scrutiny. Whether old or new, philosophy informs our values, our principles, and our processes.
Visual design is the use of imagery, color, shapes, typography, and form to enhance usability and improve the user experience. Visual design as a field has grown out of both UI design and graphic design.