A prototype<span> is an early sample, model, or release of a product built to test a </span>concept<span> or process or to act as a thing to be replicated or learned from. It is a term used in a variety of contexts, including semantics, design, electronics, and software programming.</span>
Answer:
'Single Character'
Explanation:
A Character, commonly abbreviated as "char", is a computer symbol, letter, or number. A keyboard is an input device that inputs a character when a key is pressed.
<span>The National Science Foundation (NSF) is the organization which </span><span>developed a network called CSNET to provide a network free to all American research and educational institutions. It is an agency in the government of the United States that is responsible for research and development in the field of science and engineering. </span>
