What is Business information system and their subsystem?

A Business Information System (BIS) refers to a system that integrates information technology and business processes to manage and support business operations. BIS includes various subsystems that cater to specific functions within an organization:

1. **Transaction Processing System (TPS):** Handles routine transactions such as sales, purchases, and inventory.

2. **Management Information System (MIS):** Provides reports and summaries of operational data to help middle management make informed decisions.

3. **Decision Support System (DSS):** Assists in decision-making by providing interactive information and analysis tools.

4. **Executive Support System (ESS):** Offers strategic information and support for top-level executives in making long-term decisions.

5. **Enterprise Resource Planning (ERP) System:** Integrates various functions (like finance, HR, inventory) into one comprehensive system.

6. **Supply Chain Management (SCM) System:** Manages the flow of products, information, and finances across the supply chain.

7. **Customer Relationship Management (CRM) System:** Handles interactions with customers, managing sales, marketing, and customer service.

These subsystems collectively form the Business Information System, streamlining operations and aiding decision-making across different levels of an organization.