The iMac is a Brand developed by Apple Inc (Formerly Apple Computer Inc). The Brand encompasses a number of computers that have been developed and released by the aofrementioned company since 1998. They include:
The iMac G4- A PowerPC G4 computer with tilt and swivel integral flat panel monitor and “Upturned pudding bowl” retaining the Computer
The iMac G5 Computer system: An All-in-one computer with flat panel display to the front and computer built into the rear of the display.
The Intel iMac Range, which spanned from 2006 to present day with CPUs ranging from the Core Duo to the current slew of Core i7 CPUs