1) Mango part 2) Mango point 3) Point of a mango 
[protocol message] The NAK (or NACK; standing for `Negative-Acknowledgment`) protocol message is sent in many communications protocols to negatively acknowledge or reject a previously received message, or to indicate some kind of error. Many protocols are acknowledgement (ACK)-based, meaning that they positively acknowledge receipt of messa... NaK, or sodium-potassium alloy, an alloy of potassium (K) and sodium (Na), is usually liquid at room temperature. Various commercial grades are available. NaK is highly reactive with water and may catch fire when exposed to air, so must be handled with special precautions. == Physical properties == NaK containing 40% to 90% potassium by weight is ...
Nursing At Keyboard
Negative Acknowledgment
Negative AcKnowledge Character
Negative acknowledgment. Response sent from a receiving device to a sending device indicating that the information received contained errors.