Apart from the targettype FILE there are types DIR (directories), FIFO (named pipes), SYMLINK (symbolic links), DEV (devices, denoted by their major and minor number), IPC (shared memory, semaphores etc.), USER (systemusers), PROCESS (processes) and SCD (System Control Data) Version 1.2.0 adds NETDEV (network devices), NETTEMP (network templates) and NETOBJ (network objects). The class SCD (system control data) contains all objects that relate to the entire system, like the real time clock, the systems name or the systems domainname or raw access to kernel memory. There are some requests that do not relate to one of the defined object classes, for example the request to add a kernel module. In these cases the placeholder objecttype 'NONE' is used.