iSight is a webcam

Webcam

A webcam is a video camera that feeds its images in real time to a computer or computer network, often via USB, ethernet, or Wi-Fi.Their most popular use is the establishment of video links, permitting computers to act as videophones or videoconference stations. This common use as a video camera...

, both external and internal, developed and marketed by Apple Inc. The external iSight was sold retail for US$149, connected to a computer via a FireWire cable, and came with a set of mounts to place it atop any then-current Apple display, laptop computer, all-in-one desktop computer, or flat surface.

Apple introduced iSight at the 2003 Worldwide Developers Conference

Worldwide Developers Conference

The Apple Worldwide Developers Conference, commonly abbreviated WWDC, is a conference held annually in California by Apple Inc. The conference is primarily used by Apple to showcase its new software and technologies for developers, as well as offering hands-on labs and feedback sessions...

, intended to be used with iChat AV, Apple's video-conferencing client.