Top Definition
Acronym for "First In Whatever Out." Used to describe some asynchronous message-processing systems, as opposed to classic FIFO (First In First Out) or FILO (First In Last Out) protocols. With FIWO, you're not really sure when you'll get served
"The file is in the queue, but it's FIWO so who knows when it'll get processed"
by isosceles October 01, 2013
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