The full form of “OPT” can vary depending on the context. Here are a few common meanings:
Optional Practical Training – A program in the United States that allows international students on F-1 visas to work in their field of study for up to 12 months after graduation, with the possibility of a 24-month extension for certain STEM (Science, Technology, Engineering, Mathematics) graduates.
Optimize – In computing and software development, “opt” is often used as a shorthand for “optimize.”
Optical – In fields like telecommunications or instrumentation, “opt” can refer to anything related to optics.
If you have a specific context in mind, please let me know!