The most popular typewriter font is Courier, although there are plenty of other ones that will most definitely pass muster for use in your cool script tattoos.
The Courier typeface was designed by Bud Kettler in 1955 and implemented for IBM’s typewriters.
The rise of computer technology saw Courier fonts adapted to use on the screen. There are different versions of it installed on most desktop computers, while many other typewriter-style fonts look very similar.