The Canon Service Tool, often abbreviated as CST, is a software utility developed by Canon Inc. for its service engineers and authorized service providers. These tools are designed to diagnose, repair, and adjust settings on Canon printers and other imaging devices. The specific tool you're asking about, V3600 version 23, seems to relate to servicing Canon printers, likely within a specific model range or series.
If you search for printer reset tools, V3600 is often the top recommendation. Here is why it stands out against newer, flashier versions: canon service tool v3600 23 best
Use free open-source alternatives