Amazon EC2 (Elastic Compute Cloud)

• Virtual servers in the cloud.
• Provides scalable computing capacity.
• You can choose OS, CPU, memory, and networking.
• Best for running applications that need full control over the server environment.
• Pay-as-you-go pricing: per second or per hour.

Amazon ECS (Elastic Container Service)

• A fully managed container orchestration service.
• Supports Docker containers.
• Lets you run and scale containerized applications on EC2 instances or AWS Fargate (serverless compute for containers).
• Integrates with other AWS services (e.g., CloudWatch, IAM, ALB).

Amazon S3 (Simple Storage Service)

• Object storage service.
• Stores data as “objects” in “buckets.”
• Highly durable (11 nines: 99.999999999% durability).
• Common use: backups, static website hosting, media storage, data lakes.
• Scales automatically; pay only for what you use.

Amazon RDS (Relational Database Service)

• Managed relational database in the cloud.
• Supports popular engines: MySQL, PostgreSQL, MariaDB, Oracle, SQL Server, Amazon Aurora.