What's the best description for "embedded hardware system"?

Question

When I hear that, I always think about an mobile device. But why is the hardware "embedded" there? Isn't the whole device the hardware? Why is a personal computer no embedded hardware system?

Answer 1

In today's world embedded simply refers to a system with one or more of the following traits:

• Single purpose (ie, not a general purpose computer, like your desktop)
• Firmware rather than software - still software, but not as easily updated (flash, etc)
• Hardware and software are designed together as a unit
• Different, perhaps more rigorous testing as software updates are not desired
• Real time computing
• Memory integrated on the CPU
• Microcontroller rather than microprocessor
• Expected high reliability (you shouldn't have to reboot your dishwasher or microwave)