The "E" in E-1 means "enlisted" although the "one" signifies the paygrade for that place. The other pay types are "W" for warrant officers and "O" for commissioned officers. Some enlisted paygrades have two ranks. Britannica Dictionary definition of RANK 1 [far more rank; most rank] : aquiring a powerful, https://www.seoclerk.com/Link-Building/371800/GIGA-SEO-PACKAGE-POWERFUL-BACKLINKS