Flux Cored Arc Welding (FCAW)
Gas Metal Arc Welding (GMAW) - also known as (MIG) Gas Tungsten Arc Welding (GTAW) - also known as tungsten inert gas (TIG) welding
Shielded Metal Arc Welding (SMAW) - also known as manual metal arc (MMA) - informally known as (Stick Welding)
Submerged Arc Welding (SAW)