Pico (Pine composer) is a text editor for Unix and Unix-like computer systems.
It is integrated with Pine and Alpine, email clients initially designed by the Office of Computing and Communications at the University of Washington.
PICO is a very simple and easy-to-use text editor offering paragraph justification, cut/paste, and a spelling checker...".
By comparison, some popular Unix text editors such as vi and Emacs provide a wider range of features than Pico; including regular expression search and replace, and working with multiple files at the same time.
By comparison, Pico's simplicity makes it suitable for beginners.
Arrow keys move the cursor a character at the time in the direction of the movement.