WEBVTT

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most of us are likely aware of the major multitasking operating systems or os's

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that manage our computers these complex pieces of software are designed for

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powerful hardware and easily capable of running many programs at once since

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their OS can prioritize Hardware task

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requests known as system calls and allocate them processing time or memory

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space as needed and chances are you've already chosen a favorite one but what

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makes things like pocket size devices tick anyhow or what about the unique

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electronic systems like the ones found in cars or even the hive-minded robots

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that will eventually defeat Humanity don't these things need some sort of

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operating system too yes they do and they actually differ from PC os's in a

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few key ways we'll start with the ones designed for battery powered devices

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like phones and tablets these might seem like they should be very different from

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a desktop OS but thanks to the incredible performance of modern mobile

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processors top mobile os's including iOS

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and Android are multitasking operating systems capable of balancing multiple

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background tasks and user input with Grace and Poise usually but it hasn't

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always been this way in the early days of mobile Computing battery life and

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performance were much less plentiful than they are today so the embedded

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operating systems were King examples of which being Windows CE and pomos they

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had limited functionality and could only handle one task at a time so by today's

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standards they'd be considered pretty useless on a phone but my grandpy tells

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me they were essential for these strange devices called

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pdas but seriously even though the days of pocket PCS are behind us embedded

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os's are still essential for many other

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low powerered limmited functionality devices like media players video cameras

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GPS units fancy dish washers or even the

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networking router which is currently allowing you to enjoy this video at

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certain times though such as when dealing with heavy machinery A System's

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need to process requests quickly and

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reliably Will trump its need to be

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flexible and easy to program for in these instances programmers turn to

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realtime operating systems a special

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variety of embedded OS which like their name suggests use specially written

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scheduling algorithms to ensure that Vital Information is processed in

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designated orders and within specified time Windows instead of dynamically

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switching between processes based on resource availability they're very

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similar to other embedded os's in that they are often developed in tandem with

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a dedicated piece of Hardware intended to run them and they can be found on

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shipping stations robotic assembly lines and medical equipment in our vehicles

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and they're very useful for ensuring that our automatic emergency breake

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doesn't get stuck behind our seat warmer activation in an OS processing que as we

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carine directly towards a brick wall Switching gears entirely there's another

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car thing for you there are operating systems that try to avoid normal

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Hardware constraints by utilizing network connections to run virtual os's

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like servers which can operate several systems simultaneously or systems that

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pool resour between even many more machines at a time the first style

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templated systems use hypervisors to create several virtual machine images on

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one extremely high-powered systems which users can then access via a network

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these machines appear from the outside to be their own dedicated pieces of

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Hardware but they're not and a second style distributed systems combine and

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then allocate the resources of many physical machines even over the internet

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to solve problems like calculating protein folding to help fight diseases

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uh Shameless plug for the lonus tech tips folding team by the way speaking of

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Shameless plugs linda.com linda.com

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