FSH 6509.11k - SERVICE-WIDE FINANCE AND ACCOUNTING HANDBOOK R-1 SUPPLEMENT 13 EFFECTIVE 9/26/90 21.3 - National Finance Center Management Accounting Structured Codes (MASC) 2103 Tables. NFC maintains a series of computer lookup tables that are used to validate the data on AD-729's and payment and collection documents. A list of some of the tables that are available to the Forest Service is given in the parent text. Table 1 contains a complete listing of the approximately 90 tables at NFC. Each table is available to Forest users and can be obtained through the CAS menu as follows: Choose (F) Financial Management Programs List from the CAS Main Menu On the next screen Your Choice is TABLES Answer the questions, the system will proceed.