Embedded system is a combination of software and hardware to make specific purpose devices and used in a wide variety of applications such as Smart Building, Smart city, Smart Transport & Logistics, Smart Retails, etc. In Embedded System we embed software into the hardware to make specific purpose device and brain of this system is either Microcontroller or Microprocessor.
General Purpose Device are those devices we can use for multiple purposes or can do multiple tasks at the same time as your Personal computer, Smartphone, Laptop, etc. Through Smart Phone, we can watch videos, send emails, chatting, calling, etc.
Specific Purpose Devices are those devices used for one purpose only and can say one task at one time like Air Conditioner, Wifi Router, Virtual Reality Glasses, Microwave, Speedometer, Projector, Home Automation, etc.