In a technical sense, RAF, MEK, and MAPK are all mitogen-activated kinases, as is MNK (see below). MAPKs were originally called "extracellular signal-regulated kinases" (ERKs) and "microtubule associated protein kinases" (MAPKs).
In a technical context, RAF, MEK, and MAPK are all part of the mitogen-activated kinase family, which includes MNK. They were initially referred to as "extracellular signal-regulated kinases" (ERKs) and "microtubule-associated protein kinases" (MAPKs), highlighting their role in cellular signaling.