You use underscore, also called underline, low line or low dash. It looks like this: _
I believe it should be because of hardware so my answer is Hardware problem
Answer:
Fair Use
Explanation:
In the United States’ copyright law, fair use means the use of a document that is copyrighted within a limited scope. Generally, before one can use a copyrighted document, permission must be sought and obtained from the copyright holder. But for usages such as the ones mention in the question otherwise referred to as "transformative", an individual can make use of a copyrighted material without first seeking permission.
This technology is known as an anti-climb collar.
Spiked collars are used to protect equipment mounted on poles like CCTV or in areas where you can easily climb a pole over a security fence. This technology offers a very simple and practical solution to protecting poles against thieves and vandals.
<span>abstraction possibly </span>