The database is arranged in the same hierarchy as that used by Electronic Outlook Corporation (EOC).  The value of a Level-2 equipment category is equal to the sum of the Level-3 categories shown below.  A category's level can be determined by the number of non-zero digits.  For example COMPUTER+MINIMUM MEMORY (541000) is a Level-3 category.

5-4-0-0-0-0 COMPUTER                                           

5-4-1-0-0-0 CPU+MINIMUM MEMORY                                 

5-4-2-0-0-0 STORAGE PRODUCTS

5-4-3-0-0-0 INPUT DEVICES

5-4-4-0-0-0 OUTPUT DEVICES

5-4-5-0-0-0 TERMINALS

5-4-7-0-0-0 COMMUNICATION INTERFACES

5-4-9-0-0-0 OTHER COMPUTER EQUIPMENT

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