The Total Network Inventory (TNI) software (hereinafter referred to as the Software) is a toolkit designed for the inventory and monitoring of information technology (IT) assets. It enables the automatic collection of data on computers, servers, network equipment, and software. The program is used for IT asset management, security monitoring, as well as for tracking changes in hardware and software. The guide presents the main steps for software installation, network scanning, and reviewing the collected data in the form of reports.