THE Advanced Camera for Surveys will be installed in the Hubble Space Telescope during the third Servicing Mission in May 2000. The ACS has three cameras, each of which is optimized for a specific set of science goals. The Wide Field Camera, is a high throughput (45% at 700 nm, including the HST OTA), wide field (200 " x204 "), optical and I-band camera that is half critically sampled at 500 nm. The High Resolution Camera (HRC) is optimized for the near-UV (24% at 250 nm including OTA), has a 26 " x29 " field of view and is critically sampled at 500 nm. The Solar-Blind Camera, is a far-UV, photon counting camera that has a relatively high throughput (6% at 121.6 nm) over a 26 " x29 " field of view. The WFC employs a mosaic of two SITe 2048x4096 CCDs with 15 mu m pixels and a SITe backside treatment, while the HRC channel is designed around a 1024x1024 CCD with 21 mu M pixels, and a near-UV backside treatment developed at the Steward Observatory. In this paper we review the performance of the devices currently selected for flight, and discuss the design of their flight packages.