Vrbo is an American vacation rental online marketplace originally known as Vacation Rentals by Owner or VRBO. It was acquired by HomeAway in 2006. Expedia Group acquired HomeAway in December 2015. In March 2019, VRBO was re-branded Vrbo, including a new logo, capitalization, and pronunciation. In July 2020, the HomeAway and Vrbo websites became a single Vrbo website

Cassandra is a free and open-source, distributed, wide-column store, NoSQL database management system designed to handle large amounts of data across many commodity servers, providing high availability with no single point of failure.