Two important early luthiers in the guitar category are Antonio Torres Jurado of Spain, who is credited with developing the form of classical guitar that is still in use today, and Christian Frederick Martin of Germany who developed a form which later evolved into the steel-string acoustic guitar.
Orville Gibson was an American luthier who specialized in mandolins, and is credited with creating the archtop guitar.
John D'Angelico and Jimmy D'Aquisto were two important 20th century luthiers who worked with archtop guitars.
Lloyd Loar, worked briefly for the Gibson Guitar Corporation making mandolins and guitars. His designs for a family of archtop instruments (mandolin, mandola, guitar, et cetera) are held in high esteem by today's luthiers, who seek to reproduce their sound.
Dana Bourgeois is a luthier who specializes in acoustic guitars
During the 1990s, as five-string basses became more widely available and more affordable, an increasing number of bassists in genres ranging from metal to gospel began using five-string instruments for added lower range. As well, the onboard battery-powered electronics such as preamplifiers and equalizer circuits, which were previously only available on expensive "boutique" instruments, became increasingly available on modestly-priced basses.
In the 2000s, some bass manufacturers included digital modelling circuits inside the instrument to recreate tones and sounds from many models of basses (e.g., Line 6's Variax bass). Traditional bass designs such as the Fender Precision Bass and Fender Jazz Bass remained popular in the 2000s; in 2006, a 60th Anniversary P-bass was introduced by Fender.