[robotresearcher]

Just in case this is useful to you one day: A travel visa is a normal, uncapitalized noun "visa". The capital "VISA" is a trademark of the credit card company. Neither is an acronym.

[otterley]

Trivia: VISA is in fact a recursive acronym, much like GNU: Visa International Service Associaton.

[foobarbazqux]

Actually a recursive backronym, according to Wikipedia, but unfortunately {{citation needed}}.