There are two available modes for playing the guitar; strum or pick. In Strum mode you will here the notes played back quickly one after another like when using a plectrum and they will stop after the guitar chord is complete, in pick mode they will keep going until you tell it to stop. This is also true when using the MyChords panel. You can toggle between these two modes using the button at the top of the guitar chords application.
Guitars have been played since the Renaissance era, after descending from the ancient Greek instrument, the kithara. Or, at least, that's how the theory goes: the only real proof for this is the similarities between the Greek word and the Spanish word, quitarra. Early guitars often had four strings, evolving into the six-string version we know today in the late 1600s. Anton Stradivari, the famous violin-maker, also had a hand in making guitars. There's now only one Stradivarius guitar left in existence.