Embedded means that something that is not itself computer contains one, running some dedicated control application. If a Raspberry Pi is built into a toaster, w

Embedded means that something that is not itself computer contains one, running some dedicated control application. If a Raspberry Pi is built into a toaster, where it controls the temperature and toasting duration according to the user-selected selected darkness level, it's embedded. If the toaster has a screen, and you can install and uninstall apps on the Pi, then it doesn't look so embedded any more.