Unions is an application that automates the basic functions of business associations. Unions allows you to store and update detailed information about each company of the union: a digital company profile, lists of employees with positions, presentation materials. The application automates surveys and events, automatically controls the delivery of information and maintains a calendar. Unions has the functions of a messenger based on the Telegram API - chats, groups, channels, bots, which allows you to build a networking space within a business association. Allows you to configure interaction access levels depending on the roles, status of employees and readiness for communications. Allows each community company to maintain its own information feed for other member companies and employees, a news feed, post information about events, and provide information about the business association.