is a utility from Apple that allows you to install Microsoft Windows on your Intel-based Mac. Bootcamp 3.0 was a major release bundled with Mac OS X 10.6 Snow Leopard, which introduced significant improvements for Windows 7 support.
If you are trying to get drivers for a newer Mac or a newer version of Windows, do not use 3.0. Instead: Bootcamp 3.0 64-bit.exe Download