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One cause of an ergonomic injury could be typing at a keyboard with improper posture or positioning. The improper technique could cause carpal-tunnel, the ergonomic injury.
There is a book called the measure of man and woman, by Henry dreyfus accosiates. His all the ergonomic data you could ever need.
These items are sold as disposable but you could reuse them.
One can buy a swivel stool online from the Over Stock website. One can also purchase a swivel stool from online websites like eBay, Amazon, Way Fair and many more.
If anything is comfortable, it should be ergonomic. Assuming there is more than just one kind of Brown Ottoman, you would most likely have to try a few until you find one you like.
There are many online sites where someone could purchase Swivel Sweepers. These online sites include Walmart, Amazon, eBay, Target, Sears, HSN, and many more.
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Not sure how power cables relate to keyboard operation or operators. If the length of the keyboard's cable, or where it enters the keyboard, gets in the way of how one interacts with the keyboard then there could be an ergonomic problem.
In the US, you can buy disposable cups in Walmart and Winco. In the UK, you would go to Deebee and Makro or you could go to your local cash and carry.
Since you could remember
There are many places you can find more information on disposable waterproof cameras. You could possibly go to a local tech store and ask someone who works there.
There are several stores where people can purchase ergonomic computer trays. Ergo Direct USA and Ergo Online Store both sell ergonomic computer trays.