What are synthesizers?

Some articles on synthesizers, synthesizer:

Martha Wash (album) - Personnel
... Eastmond Keyboards, Synthesizers, String Arrangements Charlene Moore Keyboards, Vocal Backing Brian Alexander Morgan Keyboards, Synthesizers, Drum ...
My Life Would Suck Without You - Composition
... The instruments utilised in the song include synthesizers, guitars, drums, and bass ... The song begins with mellow guitar plucking and transcends into a melody of synthesizers, guitars, and synthesized drums ... then cascades into a chorus of crashing cymbals, bass, synthesizers, and loud guitars ...
The Dollar Album - Personnel
... Bass Guitar William C Lyall - Piano, Keyboards, Synthesizers Richard Cottle - Prophet Synthesizer Danny McIntosh Jr - Guitar Trevor Horn - Bass Guitar Bruce Woolley - Keyboards ...
The Multivox Range - Synthesizers
... Multivox produced over 15 different types of synthesizers, almost all with names beginning with "MX-" (except for SQ-01) ... MX-57/Electro-Snare - A drum synthesizer with 2VCO/VCF/VCA/SWEEP ... MX-75 - Duophonic preset synthesizer with aftertouch effect ...