Where does the sentence The quick brown fox jumps over lazy dog come from?

The sentence "The quick brown fox jumps over the lazy dog" is a pangram. This means it uses all 26 letters of the English alphabet at least once.

However, there's no known origin for the specific sentence itself. It's likely a creation of someone wanting to create a succinct pangram, though it may have been influenced by earlier versions of the concept.

It's worth noting that there are several other pangrams, and some variations of the quick brown fox sentence have existed for a long time. For example, in 1908, the sentence "The five boxing wizards jump quickly" was listed in a book of word puzzles.

Ultimately, while the exact origin of the "quick brown fox" sentence remains unclear, it's likely a combination of existing ideas and creativity.