The releases in this directory are of one of three types. If you are unsure of which build to use, please select the 'qt2' one, as it is the default build for all Recon units. You will find the naming below as part of the filename for the download tgz file (tar-gzip image). Please note that the RE5 builds are for all RE3 and RE5 Recon units (see the Recon part number on the sticker underneath the battery). The re5-15 builds use the older 2.6.15 kernel. The "non-15" builds use the newer 2.6.20 kernel and is recommended for most users. For RE5 builds, please see README-sdgboot-update.txt. qt/qt2 Qtopia. This build is the default that is shipped on all Recon and Recon X-Series units. gpe Gnome Palmtop Environment. This build uses GTK+ libraries. opie Opie release.