When a bill reaches the presidents desk what are the four possible outcomes?

When a bill reaches the president's desk, there are four possible outcomes: the president can sign the bill into law, allowing it to take effect; veto the bill, which sends it back to Congress with objections; take no action for ten days while Congress is in session, automatically making it law; or take no action while Congress is adjourned, resulting in a "pocket veto," where the bill fails to become law.