A keyboardist or keyboard player is a musician who plays keyboard instruments. Until the early 1960s musicians who played keyboards were generally classified as either pianists or organists. Since the mid-1960s, a plethora of new musical instruments with keyboards have come into common usage, such as synthesizers and digital piano, requiring a more general term for a person who plays them. In the 2010s, professional keyboardists in popular music often play a variety of different keyboard instruments, including piano, tonewheel organ, synthesizer, and clavinet. Some keyboardists may also play related instruments such as piano accordion, melodica, pedal keyboard, or keyboard-layout bass pedals.