than be a general-purpose computer for multiple tasks. Some also have
real-time performance constraints that must be met, for reasons such
as safety and usability; others may have low or no performance
requirements,allowing the system hardware to be simplified to reduce
costs.
2. Embedded systems are not always separate devices. Most often
they are physically built-in to the devices they control.[citation
needed].
3. The software written for embedded systems is often called
firmware, and is stored in read-only memory or Flash memory chips
rather than a disk drive. It often runs with limited computer hardware
resources: small or no keyboard, screen, and little memory.
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