PRiSMA is an image search application for tablet and desktop devices intended to facilitate and promote the searching of images in parallel. With an intuitive user interface, users can branch their queries into multiple horizontal sliding strips to simultaneously explore different perspectives of large image collections (e.g., colors, geographical location or topic). Strips can be easily created, tailored, merged, and removed, allowing users to effectively perform multiple queries and manage the results in a dynamic and orderly fashion. With PRiSMA we aim to explore the potential and limitations of parallel image search from a user perspective.