tl;dr: They're called threads because thread is an apt metaphor. When you start a thread, you rely on the operating system to allocate processing time so that your thread can execute. While your thread is executing, the processor (or core) is placing all of its attention on your thread.
The long threads are called the warp and the shorter cross threads are called the weft.
The fine threads in a cloth are called fibers. These fibers are woven together to create the fabric.
The tool for cutting internal threads is called a tap. A tool for cutting external threads is called a die.
UHJ67
Velcro.
The length of the metal threads at the end of a spark plug is called the "reach".
The swirls on a nut are called threads and on a bolt they're also known as threads. These threads help the nut and bolt to grip and tighten together securely.
Metric threads are called that way, because you measure the distance between the threads (at the highest point), in millimeters., As opposed to SAE (standard), which are measured by the number of threads in an inch.
wefts
Lint.
A hanging bunch of threads is called a fringe. It is often used as decorative trim on clothing or home furnishings.
The simple subject of the sentence 'One set of threads is called a warp' is 'set'.