Linsear Write
A formula built inside the US Air Force to evaluate technical manuals.
Linsear Write was designed inside the US Air Force and never formally published. It uses a 100-word sample, counting "easy words" (≤2 syllables) and "hard words" (≥3 syllables). Formula: (easy + hard × 3) / sentences, then adjusted based on whether the result exceeds 20. It's less common in modern tools but still appears in military and government editing workflows for training documentation.