Software as a service is a software licensing and delivery model in which software is licensed on a subscription basis and is centrally hosted. It is sometimes referred to as on-demand software and was formerly referred to as software plus services, SaaS is typically accessed by users using a thin client via a web browser.
Hardware and software maintenance services. Maintenance in clude both hardware maintenance and support services, and network software maintenance and support services. … Software maintenance and support in clude long-term and pay-as-you-go (incident-based) support contracts.