Version 1, actually[1]: The PS.temp file is a special file created by the Adobe Photoshop program to implement the program's virtual memory scheme. Virtual mem

Version 1, actually[1]: The PS.temp file is a special file created by the Adobe Photoshop program to implement the program's virtual memory scheme. Virtual memory allows you to work on images of nearly any size, by using a hard disk instead of RAM (random-access memory) to hold information. The PS.temp file contains the program's virtual memory information. The file is normally deleted when you quit the program. For implementation details, see the files UVMemory.p and UVMemory.inc1.p in the source distribution[2]. [1] https://archive.computerhistory.org/resources/access/text/2013/01/102640940-05-01-acc.pdf#page=410 https://archive.computerhistory.org/resources/access/text/20... [2] https://computerhistory.org/blog/adobe-photoshop-source-code/ https://computerhistory.org/blog/adobe-photoshop-source-code...