A book is addressed to the specialists, having an experience development on the platform of BAS : Enterprise". With her help it is possible to master a new platform mechanism is the system of co-operation. The system of co-operation allows to realize live interaction of the applied decision with users, and also users one or the different applied decisions inter se. Thus such communication can be tied to implementation as concrete business-tasks, so to the discussion of concrete objects, work with that is conducted in a decision. BASic possibilities of this mechanism can be used without programming, more intricate problems will be realized by means of development by means of built-in language of " BAS : Enterprises". The different scenarios of application of the system of co-operation are considered in a book.One of examples describes co-operating of users with each other, that can be executed "from boxes" without programmatic revisions. Other example shows, how to organize co-operation of users on a certain algorithm that is described in built-in language. The third example demonstrates development of "skilled helper" - robot that answers the questions of users.Also two examples are examined in a book, in that the system of co-operation is used for realization of communication on to initiative of server side of " BAS : Enterprises". The first example is programming of algorithm, realizing the function of notification of client application about the course of performance of the protracted operation on a server. Second is the programmatic forming of notifications of сотруд-ников about the change of the state of information in a data BASe (for example, that a new order that it is needed to process and deliver to the client appeared). For creation of demonstration examples a version is used 8.3.14.1411 platforms of" BAS :Предприятие 8".A book is produced edited Maxim Радченко.Additional materialsInformative BASes with the examples described in a book are published on the portal of BAS :ИТС. you can get them to address of BAS.ru/download/book demo/.After a purchase additional possibility to get a book in the format of is given."