(Fretted). The term "steel guitar" can refer to instruments with multiple tunings, 6 to 14 strings, and even multiple fretboards. To add even more confusion, the term "Hawaiian guitar" refers to an instrument played flat on the lap with a steel bar outside of Hawaii, but in Hawaii, it is the early term for the slack key guitar. Lorene Ruymar clears up the confusion in her new book that takes a look at Hawaiian music; the origin of the steel guitar...