Chapter . Manage Login and Startup Items
Mac OS X has two types of items that it launches at startup or at login. The names Apple uses for these items has fluctuated in previous versions of Mac OS X; in Tiger, Apple has returned to a more logical naming convention:
Login items are applications, documents, or folders that become active, launched, or open when you log in to your account, whether at startup or later.
Along with login items, Mac OS X has startup items—low-level programs that activate when the Mac starts up, before any users log in. These startup items are akin to the extensions of Mac OS 9 and earlier, and include drivers, kernel extensions, network services, and other items that affect the Mac as a whole, no matter which user is logged ...