D_back 1.31 is a program for making backup archives in zip format. This software is developed to facilitate making reserve data copies under Windows operating systems. This program was designed as utility with command-line nterface. All necessary information, for making archive locate in simple text file - BACKUP SET FILE (format of this file looks like format of standard Windows .ini file). Name of this file is sent as a parameter to the program when starting. Program allows quite simply to create archives with various features, such as stack archives without duplication unchanging files in archives, creating from copying to copying.Program can execute any commands of operating system before begining data processing, and after completion of archive creation. Exists possibility to notify user by e-mail about successfully or abnormal job execution. Program is oriented on joint use with various Windows task shedulers (such as windows NT AT utility) for automatic starting in certain time moments. Possibility of performing commands of the operating system allows flexible organize automatic data processing on servers with stopping and following start necessary server processes.It will be interest both for system administrators and for ordinal users who need to archive their data.