NASDAQ National Market Securities - Nasdaq-NM
  
We think of the NASDAQ as a singular entity...a monolithic stock exchange. But it’s actually a web of interconnected networks and exchanges. The NASDAQ National Market Securities is basically what we think of when we think of the NASDAQ. It's like the lead singer of a band. The face. The main draw.
If you want to buy shares of AAPL, you'll purchase them on the NASDAQ National Market. It provides the market for the highest-profile companies...those that meet the highest listing requirements.