| 摘要 |
This disclosure relates to a system which displays the availability of categories of items over a predetermined number of units of time. Provision is made to constantly update the display by incrementing or decrementing the appropriate item categories between initial and final dates of use of any item. The units of time may be classified into groups to allow an expired group of units of time to be annexed to the last group of units of time to continuously utilize the system over a predetermined future time period.
|
