Training programs are available from professional design schools or from colleges and universities and usually take 2 to 4 years to complete. Graduates of 2-year and 3-year programs are awarded certificates or associate degrees in interior design and normally qualify as assistants to interior designers upon graduation. Graduates with bachelor's degrees usually qualify for entry into a formal design apprenticeship program. Basic coursework includes computer-aided design (CAD) and building information modeling (BIM), building and life safety codes, ADA regulations, building systems, space planning, drawing and sketching, perspective, color psychology, materiality, interior and architectural history, ergonomics, anthroprometrics, ethics, business principles and human psychology.