With reference to "Software as a Service (SaaS)", consider the following statements:

1. SaaS buyers can customise the user interface and can change data fields.
2. SaaS users can access their data through their mobile devices.
3. Outlook, Hotmail and Yahoo! Mail are forms of SaaS. Which of the statements given above are correct?

Software as a Service (SaaS) is a software licensing model where software is accessed via a subscription and hosted on external servers.

SaaS provides users access to software programs over the internet, eliminating the need for local installation. This allows users to access their data from any device (computer or mobile phones) with an internet connection and a web browser.

Modern web-based SaaS solutions are often flexible, allowing customization for specific business or individual user needs. This includes customizing the user interface and data fields.

Web-based email services like Outlook, Hotmail, and Yahoo! Mail are classic examples of SaaS.

Statement 1 is correct: SaaS buyers can typically customize the user interface and data fields. Statement 2 is correct: SaaS users can access their data through mobile devices. Statement 3 is correct: Outlook, Hotmail and Yahoo! Mail are forms of SaaS.

Hence, all statements are correct.