Guitar chord in the abstract musical-theory of chords for all instruments. For example, in the guitar (like other stringed instruments but unlike the piano), open-string notes are not fretted and so require less hand-motion. Thus chords that contain open notes are more easily played and hence more frequently played in popular music, such as folk music. Many of the most popular tunings—standard tuning, open tunings, and new standard tuning—are rich in the open notes used by popular chords. Open tunings allow major triads to be played by barring one fret with only one finger, using the finger like a capo. On guitars
Gadget companies are explicitly drawing on that inspiration when featuring the word in names of their technologies or simply referring to the generic meaning. The word "widget" is older in this context. In the movie "Back to School" from 1986 by Alan Metter, there is a scene where an economics professor Dr. Barbay, wants to start for educational purposes a fictional company that produces "widgets: It's a fictional product." Gadget A gadget is a small tool such as a machine that has a particular function, but is often thought of as a novelty. Gadgets are sometimes referred to as "gizmos". The