Not to be confused with interior decoration, interior design, which evolved from interior decoration, involves a multitude of technical, analytical, creative skills, and understandings of architectural elements. There is a wide range of disciplines within the career of interior design. Domestically the profession of interior design encompasses those designers who may specialize in residential or commercial interior design. Within residential design one can specialize in kitchen and bathroom design, universal design, design for the aged, multifamily housing amongst others. Other interior designers may dwell in the commercial or contract realm of interior space design. In addition to the above commercial interior designers may specialize in furniture design, healthcare design, hospitality design, retail design, workspace design, sustainability, and if they are a registered architect they can focus on the interior architecture of a space. It is the intent of the professional interior designer to improve the psychological and/or physiological well being of their clients. The professional interior designer achieves this by understanding their clients needs, seeking appropriate solutions, respect their clients social, physical and psychological needs and applying them in a safe and ecologically sensitive manner that promotes the health, safety and welfare of the clients. Interior decoration deals with the home renovations that can be easily and quickly changed, and at lower budgets such as changing kitchen cabinets, selecting wall paper, selecting furniture and usually does not deal with structural building codes. An interior decorator does not need a degree, but has a certificate in interior decorating, while an interior designer would have a four year degree in interior design. The word "decorator" in the phrase "interior decorator" is not an accurate one, since the decorator also changes style and quality of life with a home renovation, so the phrase should be: interior decorator/stylist.