It was probably coined by this journalist named O'Sullivan, although now there's a new theory that it wasn't.

一般认为记者奥沙利文发明了这个词,尽管现在有新理论认为他们并没有联系

美国内战与重建课程节选 : 耶鲁公开课

F-O-O in lowercase and, in fact, foo it is buggy because I typed lowercase F-O-O and FOO yet I get back capital F-O-O as both the original and the copy and that's simply because I haven't done this correctly.

小写的f-o-o，实际上，它是有bug的，因为我输入小写的,而我得到的原始的和拷贝的都是大写的,简单说，我处理错了。

计算机科学课程节选 : 哈佛公开课