For AWS SAA-C03 in order of exam weight: IAM, VPC, security groups, subnets, and NACLs for Domain 1. EC2, RDS multi-AZ, load balancers, Auto Scaling, SQS, and API Gateway for Domain 2. EC2 instance families, RDS, DynamoDB, Lambda, ElastiCache, and CloudFront for Domain 3. EC2 pricing models, Cost Explorer, and Trusted Advisor for Domain 4. The A2 Learning deck covers all of them with dedicated cards per service