An embedded system can be defined as the computing device that has computer hardware, either with software embedded in it as one of its most important component. It may be an independent system or a part of a larger system. The emergence of embedded systems is a recent development. As a scientific discipline it resembles the state of microelectronics (and VLSI design, in particular) around 1980. Todayâ„¢s challenge is similar to back then, except that the stakes are probably higher. Embedded systems will appear in virtually all devices, and intelligent devices have the tendency to oust their "stupid" counterparts from the market place, just like CD players have ousted gramophone players. Thanks to developments in microelectronics, the computing power of the desktop computers is now becoming available on the palmtops. Embedded systems are heterogeneous. Since they are mixtures of hardware and software, trade-off is important design decisions: do we realize a function in hardware or in software But embedded systems are more heterogeneous than just combining computer science & digital electronics. and text provides a brief introduction to the wide eld of embedded systems. It covers the history and the main aspects of hard- and software design for embedded systems. The basic concepts of synthesis and automated verications are introduced and a short overview of well-known metrics, which are used to describe the economical and technical at-tributes of a system, is provided. Additionally the deferenceâ„¢s between commonly used operating systems are discussed.

Anti-lock breaking system is designed to help the driver maintain steering control during hard breaking , especially in slippery conditions .It prevents the wheels from locking up , helping you maintain steering control during braking . In a similar situation, driving a car equipped with four-wheel ABS, it would be easier for you to steer your vehicle while braking.