SaaS - Software as a Service
Software as a Service is an online service of software over the internet.
The software is centrally hosted by a Saas provider and is accessible by users having a web browser. The user is hiring the services while the SaaS provider is responsible for installation, maintenance and upgrades of the software. The solution is typically available in a renting model.
Increasingly also Business Intelligence and Corporate Performance Management solutions become available in a Saas Model.