Abstract: An improved digital optical compact disc is disclosed which incorporates a further information storage element or area for storage and retrieval of track play selection information. The further storage area is comprised of defined information containing regions whose shading or alteration by the user indicates whether a corresponding track is to be skipped or played. An improved compact disc player reads the information containing defined regions and is capable of automatically selecting particular tracks for play. The information contained in the defined regions is stored in a format which is at-once visually-recognizable, machine-readable and manually-alterable.

Abstract: A lighting fixture is slidably mounted on a track support which may advantageously be secured to any existing or available structure within or around the work space. In one preferred embodiment, it is secured to the side of a computer monitor which is either located on or adjacent to the work surface which is to be illuminated. The track support may be mounted on the computer monitor or other surface at any angle from vertical through horizontal thus providing a wide variety of options for an individual using the improved fixture of the present invention. The lamp fixture socket support is preferably rotatably mounted on a sliding car member which moves along the track support and also provides a first axis of rotation for the fixture. A reflector housing is also rotatably secured to the sliding car or fixture which thus provides a second axis of rotation for the fixture allowing greatest flexibility for positioning the lamp.