Following the industrial standard set by PC/104 consortium, PC/104 and PC/104-plus are defined as a mini PC module with ISA extension (PC/104) and with PCI extension (PC/104-plus) functionality individually.

96(L) x 90(W) mm
(3.8" x 3.5")

3.5" ESB is a de-facto standard for Taiwanese Industrial PC makers and is broadly adopted by customers. It is characterized by its 3.5" device size.

145(L) x 102(W) mm
(5.7" x 4")

EBX is a de-facto standard of industry set by Motorola/Ampro and some other industrial PC makers. Lots of IPC makers follow this standard to design their proprietary layout as a 5.25" embedded system board

203(L) x146(W) mm
(8" x 5.7")

This is a standard form factor, featuring ISA add-on cards, that is widely adopted in industrial applications during the last decade.

185(L) x 121.5(W) mm
(7.3" x 4.8")

This is a non-standard form factor that adopts PICMG 1.0 signaling with PCI connection. It helps save the space, when the systems ae deployed in a space limited environmet.

185(L) x 121.5(W) mm
(7.3" x 4.8")

ATX is a well-known form factor for consumer motherboards. It has various versions like microATX, FlexATX and EmbATX for different market segments and vertical applications.

224 (L) x 224 (W) mm
(8.8" x 8.8")