These are BOSCO tarballs for several platforms. They are the stripped tarballs from the 8.5.7 release. They were built in the NMI lab from the head of V8_5_7-branch (cca257958fee96a). The NMI run id was 382922 boscoinstaller is a copy of bosco_findplatform in the source tree. bosco_quickstart is copied out of the source tree.