was introduced in 1998.]] and the early Intel iMacs. Earlier revisions excluded the integrated iSight camera above the screen.]]The iMac is an "all-in-one" desktop Macintosh computer designed and built by Apple Inc. It has been a large part of Apple's consumer desktop offerings since its introduction in 1998, and has evolved through three distinct forms. In its original form, the G3, the iMac was egg-shaped with a CRT monitor, mainly enclosed by colored, translucent plastic. The second major revision, the G4, moved to a design of a hemispherical base containing all the main components and an LCD monitor on a freely-moving arm attached to the top of the base. The iMac G5 and the Intel iMac placed all the components immediately behind the monitor, creating a slim design which tilts only up and down on a simple metal base. The current iMac shares the same form as the previous models, but is now thinner and uses aluminum and glass for its case. The machine enjo