Eastman Kodak Co, Rochester, New York is energetically exploiting its Photo CD technology and the latest application is a writable compact disk publishing system that promises to make it economical for hundreds of applications to benefit from the ability to write, store and retrieve information on CD: the new Kodak Writable CD system is designed to offer commercial users a standard, low-cost alternative to traditional methods of publishing data CDs and consists of the Kodak PCD Writer 200, which writes and reads data to and from disks at twice the speed of conventional CD writers and also supports multi-session recording; the Kodak Writable CD disk, a write-once medium that can be read in standard CD hardware devices and stores between 550Mb and 650Mb of data, text, images and digital audio, depending on the format; and the Kodak Publishing Software to drive the PCD Writer 200 from a customer’s host computer available for MS-DOS, Windows, Macintosh and Unix; the disks cost about $25 each, but the company did not say what the capital outlay was for the system.