This puzzle was created as part of Enigmarch, a daily puzzle construction challenge.
Here is no thoughtful hint.
②④_ machine _⑦___ language ⑧⑤_ party _⑨_ virus ⑥⑪_ network ⑫⑩_ display __① test ③__ code
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This puzzle is about:
acronyms that are often used redundantly, like "PIN number" (which stands for "personal identification number number").
Using this, the blanks can be filled in:
(These answers are in alphabetical order, which helps to confirm that they are correct, and fill any gaps.)
Then, the numbered circles spell out the answer, TAUTOLOGICAL.