A two phase reservation mechanism for use with computer networks carrying voice or other time or bandwidth sensitive traffic. A perspective system that has a predefined relationship with the object is created on the display. The degauss circuitry is configured to generate a degauss signal to be applied to the write head by the write driver. Additives, such as UV absorbers and anti-oxidants may be included to alter the rate at which the mark becomes invisible. The first slab member is movable along the bottom surface of the first extension part and has an end penetrating through the first perforation to be disposed over the base. In an alternative embodiment, the wireless communication terminal changes the maximum transmit power limit on a first operating frequency on a per-slot basis to reduce the impact of harmonic or intermodulation distortion on a received signal at a second operating frequency.