US Patent 7529096 Common framework for stackable modulator personal computer

A common framework for a stackable modular personal computer comprises an outer frame and an inner frame and is capable of accepting an expansion card connecter and an expansion card projected out to an inner space thereof from a lower layer thereof. The inner frame can further be combined with a supporting frame use for combining with a CD-ROM drive or a hard disk driver. Whereby, one same common framework can have three different uses so as to attain to the function of one framework with multiple uses to save the cost for manufacturing different frameworks.