Final answer:
The heart of an information system is called a Database Management System (DBMS), which is essential for storing, managing, and retrieving data. It supports various activities and enables efficient decision-making, as seen in modern agriculture where it replaces traditional sources like the Farmer's Almanac.
Step-by-step explanation:
The heart of an information system, which is a collection of all relevant data organized in a series of integrated files, is known as a Database Management System (DBMS). A DBMS serves as the backbone for data management and is responsible for storing, retrieving, and managing data in databases. It provides users with the tools to handle large amounts of information effectively and supports activities such as data entry, data queries, and reporting. Farmers in the modern age, for example, rely on precise data provided by DBMS and other data systems to make informed decisions regarding when to plant and harvest their crops, eliminating much of the guesswork that was once a major part of agriculture. The transition from relying on traditional sources like the Farmer's Almanac to employing advanced technology like global positioning systems and weather monitoring services illustrates the critical role that a database plays in current information systems.