1.   Both disks provide a large selection of stills and movie clips.

2.   Digital video disks provide better picture and sound than conventional videocassettes, but consumers have not yet moved in mass to the digital products.

3.   For users with Internet connections, the disk provides links to the Web sites of NASA, Jet Propulsion Laboratory, Hubble Telescope, Galileo probe and others.

4.   Instead, rely on disks to provide huge volumes of information, such as multiple shopping catalogs, national phone listings and a broad sampling of software programs.

5.   The disk also provides an account of a bombing attack in December on a Philippines Airlines jumbo jet en route to Tokyo from Manila, the officials said.

6.   The second disk provides setup and test tones for evaluating every aspect of your sound system.