title: Common Building Block
text: # Common Building Block
  
  Common Building Block (CBB) was a set of technical standards for laptop components introduced by Intel in 2005, and adopted by some manufacturers, including Asus, Compal, and Quanta.
  
  ## Creation
  
  In 2004, the Common Building Block program promoted the use of industry-accepted mechanical and electrical specifications for three notebook components: 14.1-inch, 15-inch, and 15.4-inch liquid crystal displays (LCDs); 9.5mm and 12.7mm optical disc drives (ODDs); and 2.5-inch hard disk drives (HDDs). The program consisted of:
  
  * A Web site to provide a centralized repository of information about the program, participants, and platform and ingredient specifications
  * A continually updated list of CBB-compliant ingredients (submitted by suppliers)
  * A testing and verification service for candidate products
  
  The defunct repository site mobileformfactors.org was established to standardize components, and included:
  
  * Hard disk drives
  * Optical disc drives
  * Liquid crystal display panels
  * Battery packs
  * AC/DC power adapters
  * Keyboards
  * Customizable notebook panels
  