1. The archetypal really stupid application for an embedded
microprocessor controller; often used in comments that imply that a scheme
is inappropriate technology (but see
elevator controller). DWIM for an
assembler? That'd be as silly as running Unix on your toaster!
2. A very, very dumb computer. You could run this program on
any dumb toaster.
See bitty box,
Get a real computer!, toy,
beige toaster.
3. A Macintosh, esp. a Mac in the original unitary case. Some hold that this is implied by sense 2.
4. A peripheral device. I bought my box without toasters,
but since then I've added two boards and a second disk drive.
5. A specialized computer used as an appliance. See web toaster, video toaster.