According to well-respected tech schools like Iowa Valley Community College District, New England Institute of Technology, and Lincoln Tech, there are four main types of welding. These types include: MIG - Gas Metal Arc Welding (GMAW), TIG - Gas Tungsten Arc Welding (GTAW), Stick - Shielded Metal Arc Welding (SMAW), and Flux-Cored - Flux-Cored Arc Welding (FCAW). Other websites also include Energy Beam Welding (EBW), Atomic Hydrogen Welding (AHW), Gas Tungsten-Arc Welding, and Plasma Arc Welding.