was not updated as was the case with OSAXes. The operating system did not indicate the launch of such processes nor indicate whether or not they were running. Other non-INIT extensions INIT-type extensions were loaded at boot time to update the operating system. Confusingly, various other files could be placed into the Extensions folder as well, many of which were not loaded at boot time. The most notable of these were shared libraries which were commonly put into the Extensions folder for ease of location. Shared libraries were not loaded at boot time. INIT-type files were not the only type of system extension. Another type was scri, or WorldScript extension. The BootX Linux bootloader was implemented as a scri simply such files were loaded very early on in the boot process, before all other extensions. BootX could then display a dialog offering to let the user finish booting Mac OS or load Linux instead. See also Terminate-and-stay-resident program (DOS) References Software add-ons Classic Mac OS