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This is my work space. I have a standing desk that has adjustable heights. I work standing at the desk or easel or sitting on a high stool.

 
 
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This is my computer. I use it standing or sitting at a high stool. It is a relatively high spec pc that runs the Linux Mint operating system. it's housed in its' own cabinet/shelving unit that is attached to the wall. The whole thing closes up neatly to disguise the hard drive, keyboard etc. ...

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...like so