| #

## Pattern File Numbering

To allow you to compare the current pattern file in your software products to the most current pattern file available from Trend Micro, pattern files have a version number.
The pattern file numbering system uses 7 digits, in the format xx.xxx.xx.
For the pattern file number 1.786.01:

- The first digit (1) indicates the new numbering system. (The second of two digits in this segment of the pattern file identifier will not be utilized until the number increases from 9 to 10.)
- The next three digits (786) represent the traditional pattern file number.
- The last two digits (01) provide additional information about the pattern file release.

| ##### Note The anti-spam pattern file uses a different numbering system.