The main categories included in design are typically user experience (UX), user interface (UI), graphic design, industrial design, and architectural design. These categories encompass various aspects of design that focus on creating functional, aesthetically pleasing, and user-friendly products and environments.

User experience (UX) design is concerned with the overall experience a user has while interacting with a product or service. It involves understanding user needs, behaviors, and motivations to create a seamless and enjoyable experience. User interface (UI) design, on the other hand, focuses on the visual and interactive elements of a product, such as buttons, menus, and navigation. According to a report by Statista, the global user experience design market is expected to reach $27.5 billion by 2025, highlighting its importance in the design industry.

Graphic design is the art and practice of visual communication and problem-solving through the use of type, space, and images. It is essential in creating brand identities, advertising campaigns, and digital media. The graphic design industry is projected to grow at a compound annual growth rate (CAGR) of 4.2% from 2021 to 2025, according to Grand View Research.

Industrial design involves creating products that are both functional and aesthetically pleasing. This category includes everything from consumer electronics to furniture and vehicles. The industrial design market is expected to reach $318.5 billion by 2025, according to MarketsandMarkets.

Architectural design focuses on the planning, designing, and constructing of buildings and other physical structures. It is a discipline that requires a deep understanding of both aesthetics and functionality. The global architectural design market is projected to grow at a CAGR of 4.5% from 2021 to 2025, according to Grand View Research.

These categories are interconnected and often overlap, as successful design solutions require a holistic approach that considers all aspects of the user's experience. By understanding the main categories of design, professionals can create more effective and impactful solutions for their clients.