Answer:
A: used by ISP's to filter out email SPAM
C: a way to help an individual focus on best choices when deciding what to watch or buy.
Explanation:
Collaborative filtering uses a community-based approach to filter spam. It works by collecting numerous email users from around the world. By doing this, it becomes possible for users to flag emails that are spam and those that are legitimate.
Also Collaborative Filtering is one of the most efficient techniques for building a system that can help a user when it comes to recommending best choices based on information from a large number of users.
Sorry I don't understand your question
Through the use of <span>satellite imagery</span>
The program used to create and implement a database is called an operating system.
<h3>What is an operating system?</h3>
An operating system (OS) is a system that helps to manage and allocate computer resources. These computer resources are:
- Central processing unit (CPU),
- Computer memory,
- File storage,
- Input/output devices,
- Network connections.
The most used operating system are;
- Apple mac OS,
- Microsoft Windows,
- Go-ogle Android OS,
- Lin-ux Operating System,
- Apple iOS
Learn more about operating system:
brainly.com/question/24032221
