[reaperducer]

It’s ‘visa’ not ‘VISA’. Why do so many people think it’s an acronym? It’s just a normal word.

See also: Most of the Windows people in my company's IT department write "MAC" instead of "Mac." Few of them work with networking, so I don't think it's related to MAC addresses.

Wikipedia seems to concur that this is common:

"Mac or MAC most commonly refers to... Macintosh, a brand of computers and operating systems made by Apple Inc."

[disgruntledphd2]

Technically MAC is a makeup brand, but I guess that ship has sailed.