| 摘要 |
PROBLEM TO BE SOLVED: To provide an oblong card type compact disk(CD) unlike an ordinary circular shape for attaining easier storage and carriage of the CD and also for mailing the CD with reduced weight and at lower rates to which information is inputted in place of documents, to secure convenience in various points and to save the materials. SOLUTION: An oblong card form 1 is prepared and a projecting parts 5 are provided on a writing surface 2 in accordance with a fitting step 4 of a drive 3 of a CD tray. The parts 5 can prevent the slippage of an oblong CD. |
