Cisco Systems is the world leader in manufacturing of Network related equipment. The name "Cisco" is not an acronym, but an abbreviation of San Francisco. According to John Morgridge, employee 34 and the company's first president, the founders hit on the name and logo while driving to Sacramento to register the company -- they saw the Golden Gate Bridge framed in the sunlight.
The name cisco Systems (with the lowercase "c") continued in use within the engineering community at the company long after the official company name was changed to Cisco Systems, Inc. Users of Cisco products can still see the name ciscoSystems occasionally in bug reports and IOS messages.
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History of Logos 
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