BST-1 consists of three modules that can be used together or independently - Contacts' Manager, Email Distributor, and Accounting. Contacts' Manager allows interacting with Email Distributor. The email system maintains the lists of different groups of contacts (address books). It can be used to send personalized email messages automatically to many recipients, as well as, to a single one. It allows using different templates for different purposes, including newsletters.

Users can prepare and send a message in a plain TXT-format or in HTML-format. Accounting tool helps with basic accounting and reporting. Output reports are open-closing balance sheets, income and cashflow statements for selected by user period and with monthly comparative analysis. Since it interoperates with MS Excel, a user can build charts and make any additional pre- and post- calculations. It is simple, and it is easy to use. It protects transactions from errors and ensures the reconciliation of all reports.