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Embedded system

An embedded system is a combination of computer hardware and software, either fixed in capability or programmable, designed for a specific function or functions within a larger system. Industrial machines, agricultural and process industry devices, automobiles, medical equipment, cameras, household appliances, airplanes, vending machines and toys, as well as mobile devices, are possible locations for an embedded system.

Characteristics of Embedded Systems

All Embedded Systems are task specific. They do the same task repeatedly /continuously over their lifetime. An mp3 player will function only as an mp3 player.Microcontroller or microprocessors are used to design embedded systems.
Embedded systems are created to perform the task within a certain time frame. It must therefore perform fast enough. A car’s brake system, if exceeds the time limit, may cause accidents.Embedded systems need connected peripherals to attach input & output devices.
They have minimal or no user interface (UI). A fully automatic washing machine works on its own after the program is set and stops once the task is over.The hardware of an embedded-system is used for security and performance. The Software is used for features.
Some embedded systems are designed to react to external stimuli and react accordingly. A thermometer, a GPS tracking device.They are convenient for mass production. This results in low price per piece.
Embedded systems are built to achieve certain efficiency levels. They are small sized, can work with less power and are not too expensive.The embedded systems are very small in size, hence can be carried and loaded anywhere.
Embedded systems cannot be changed or upgraded by the users. Hence, they must rank high on reliability and stability. They are expected to function for long durations without the user experiencing any difficulties.The embedded systems optimize the use or resources available.