1. 129 rows  · The first 32 characters in the AsciI-table are unprintable control codes and are used to …

2. Codes 0-31 are called the unprintable Chars, and they’re mostly used to do formatting and control printers

3. Blankety-blank definition, damned; darned (used to imply an omission of an unprintable or unspeakable word): The Blankety-blank motor stalled again

4. After the mid 18th century until quite recently Bloody used as a swear word was regarded as unprintable, probably from the mistaken belief that it implied a blasphemous reference to the blood of Christ, or that the word was an alteration of ‘by Our Lady’; hence a widespread caution in using the term even in phrases, such as Bloody battle