The document categorizes different types of request strategies from most direct to most indirect: 1) Mood derivable requests that directly state the action. 2) Explicit performatives that directly state the request. 3) Hedged performatives that soften the directness of the request. 4) Want statements that imply a request through expressing a want. 5) Suggestory formulas that imply a request through a suggestion. 6) Query preparatories that imply a request through a question. 7) Strong hints that imply a request through a strong hint. 8) Mild hints that imply a request through a mild or subtle hint.