Bing found the following results
Guide to Understanding SaaS (Software as a Service) | HubSpot
What Is Software as a Service (SaaS)? | IBM
Software as a service - Wikipedia
What is SaaS (Software as a Service)? - Salesforce.com
What is SaaS? | SaaS definition | Cloudflare
What is SaaS? Software as a Service | Microsoft Azure
What is SaaS? Software as a Service Explained | DigitalOcean
What Is Software as a Service (SaaS)? Definition and Examples
What is Software as a Service (SaaS)? - TechTarget
What is SaaS? - Software as a Service Explained - AWS