A granted TxOP holder transmits the first frame of a QSTA-to-QSTA communication at a power level sufficient to ensure correct reception by the destination and at least detection by the HC, and then, with exceptions, transmits subsequent frames at a power level merely sufficient to ensure correct reception by the destination, regardless of reception or detection by the HC. The previewing of a user-selected file includes a summary of file characteristics and contents including images. A human interface diversity controller is connected to the wireless transceiver to preferentially operate with the plurality of antennas based upon a relative position of the portable handheld housing with respect to a hand of a human user. The second mode being of a higher order than the first mode. By viewing the HTML file, a user can quickly determine if he wishes to retrieve information from the network addresses and can do so by clicking in the hypertext links. After the user has defined the hierarchy of the site and the layout of each page in the site, the user \u201cpublishes\u201d the site.