Combat Survivor Evader Locator. Aviator handheld survival radio capable of voice communication as well as short burst transmission of GPS position to aid Search and Rescue (SAR) efforts.

Centennial Science and Engineering Library

This is basically Plug and Play ATA. You plug in your ATA/IDE hard drives and set them to CSEL (Cable Select) and they determine whether they are master or slave automatically, saving you from manual configuration. Unfortunally, this does not always work that great.