This paper presents a review of the position-sensitive detector (PSD) sensor, covering different types of PSD and recentworks related to this field. Furthermore, it explains the theoretical concepts and provides information about its structure and principles of operation. Moreover, it includes the main information about the available commercial PSDs from different companies, along with a comparison between the common modules. The PSD features include high position resolution, fast response, and a wide dynamic range. These features make it suitable for various fields and applications,such as imaging, spectrometry, spectroscopy and others.