Highlight from 'Astrophysics for People in a Hurry' by Neil deGrasse Tyson

Filling out the entire electromagnetic spectrum, in order of low-energy and low-frequency to high-energy and high-frequency, we have: radio waves, microwaves, infrared, ROYGBIV, ultraviolet, X-rays, and gamma rays.
— Neil deGrasse Tyson, Astrophysics for People in a Hurry