The form factor is just one of the many standards that apply to motherboards. Some of the other standards include: The socket for the microprocessor determines what kind of Central Processing Unit (CPU) the motherboard uses.
Scenic San Juan Islands. More than 170 islands comprise the San Juan archipelago, which lies off mainland Washington at the juncture of the straits of Georgia and Juan de Fuca, and is sheltered from the Pacific Ocean by the Olympic Peninsula and Vancouver Island. (There are reputedly an additional 300 rocky islands at low tide.)
The United States Geological Survey (USGS) defines the San Juan Islands as the archipelago north of the Strait of Juan de Fuca, west of Rosario Strait, east of Haro Strait, and south of Boundary Pass. To the north lie the open waters of the Strait of Georgia.