Basic Guidelines For English Spellings
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1(in ancient Greek belief) a divinity or supernatural being of a nature between gods and humans.
2
Mid 16th century common spelling of demon until the 19th century.
A background process that handles requests for services such as print spooling and file transfers, and is dormant when not required.
1970s perhaps from d(isk) a(nd) e(xecution) mon(itor) or from de(vice) mon(itor), or a transferred use of demon.