It could be Micro ATX or ATX or even something else.
This number appears on a lot of Intel motherboards.
The number you really need to find is the AA (Altered Assembly) number.
ATX is the form factor.
MB is ATX form factor.
Embedded Compact Extended Form Factor
The NLX form factor has a riser card on the edge of the motherboard.
A plant is a biotic factor.
laptop expansion memory form factor
form factor tell about the purity of sine wave
Form factor represents the feature placement, size and general layout in a mother board. The AT form factor is considered to be the largest and the oldest.
The purpose of the small form factor is to make a desktop computer appear smaller in size. It is a computer form factor which can be used for this purpose.
Limiting factor
For sure, it is the Motherboard, the Power supply, and the Chassis that determines the form factor of a computer.
The full AT form factor measures 12" x 13.8"