An embedded system is nothing but it posses following features:
1Single-functioned :Executes a single program, repeatedly
2Tightly-constrained :Low cost, low power, small, fast, etc.
3 Reactive and real-time:Continually reacts to changes in the system’s environment
Must compute certain results in real-time without delay
You can say any computing system other than a desktop computer is an embedded system
examples
Modems
MPEG decoders
Network cards
Network switches/routers
On-board navigation
Pagers
Photocopiers
Point-of-sale systems
Portable video games
Printers
Satellite phones
Scanners
Smart ovens/dishwashers
Speech recognizers
Stereo systems
Teleconferencing systems
Televisions
Temperature controllers
Theft tracking systems
TV set-top boxes
VCR’s, DVD players
Video game consoles
Video phones