What does ATX stand for when talking about motherboards?

Difference between ATX 2 slot and slot : rsffpc atx slot Q470 ATX motherboard, LGA1200 Socket for 10th11th Gen Intel CPU, Q470 Chipset, 4*U-DIMM, 2*PCIe x16 slots,3*PCIe x4 slots, 1*PCI, 2*Lan,2*DP, 1*HDMI, mabuk slot ZEBRONICS H61-NVMe Micro-ATX Motherboard for LGA 1155 Socket, Supports Intel 2nd & 3rd Generation Processors, Slot, Audio, DDR3 1600 MHz, Ports (RJ45

easybuy phones at slot 1 specification are new and now exhibit the 12V-2×6 connector According to the ATX specification, the 12V-2×6's design permits potential