Motherboard

The primary circuit board inside a computer. It is a collection of devices containing the system's resources and core components. 

Source URL: 
http://www.datarecoverytools.co.uk/data-recovery-vocabulary/vocabulary-k-p/
http://www.futuremark.com/community/hardwarevocabulary/3/
http://www.ami.ac.uk/courses/topics/0100_gls/glossary/glossm.ht