Item Cutter:

Numerals:

Because an entry beginning with a number is relatively rare in map shelflisting, use a simplified version of the Subject Cataloging Division’s convention for an expanded .A1 item Cutter to preserve the prescribed filing order.

Unless there is a conflict with the filing order of existing item Cutters under a specific G number, use the standard .A15 for the first occurrence of a number-entry item Cutter. Example:

In the event of a conflict with the filing order of an existing item Cutter, adjust the Cuttering to preserve the prescribed filing order. Example:

The standard item Cutter .A15 is also used for the first occurrence of a corporate entry that begins with a numeral. Example: