These are the image files for the brcm47xx target.
Check that the md5sum of the file you downloaded matches the md5sum below.
Shortened image file names below have the same prefix:
|Image for your Device||md5sum||File Size||Date|
These are supplementary resources for the brcm47xx target. They include build tools, the imagebuilder, md5sum, GPG signature file, and other useful files.