Mingetty is a small, efficient, console-only getty for Linux.

"getty opens a tty port, prompts for a login name and invokes the /bin/login command. It is normally invoked by init(8)."

mingetty is a minimal getty for use on virtual consoles. Unlike the getty in the util-linux or mgetty packages, mingetty is not suitable for serial lines, which is why it's smaller.