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A keyboard protector or keyboard cover is a device which is placed on top of a computer keyboard in order to reduce contact with the environment. Keyboards are susceptible to corrosion damage from liquid spills and build up of dust and debris, requiring frequent cleaning and maintenance.
Mai Thúc Loan (or Mai Huyền Thành (梅 玄 成), self-proclaimed Mai Hắc Đế (梅 黑 帝, The Black Emperor or The Swarthy Emperor), was the Vietnamese leader of the uprising in 722 AD against the rule of the Chinese Tang dynasty in the provinces of Hoan Châu and Ái Châu (now Thanh Hóa and Nghệ An).