What is the difference between a software bug and software defect?

Q: What is the difference between a software bug and software defect? A: "Software bug" is nonspecific; it means an inexplicable defect, error, flaw, mistake, failure, fault, or unwanted behavior of a computer program. Other terms, e.g. "software defect", or "software failure", are more specific. While the word "bug" has been a part of engineering jargon for many-many decades; many-many decades ago even Thomas Edison, the great inventor, wrote about a "bug" - today there are many who believe the word "bug" is a reference to insects that caused malfunctions in early electromechanical computers.

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