Original: History Before the development of the electric guitar and the use of synthetic materials , a guitar was defined as being an instrument having '' a long , fretted neck , flat wooden soundboard , ribs , and a flat back , most often with incurved sides '' .
Simplified: Types of guitars A guitar was described by Dr. Michael Kasha as an instrument that had '' a long , fretted neck , flat wooden soundboard , ribs , and a flat back , most often with incurved sides '' .