If you want to know what does stem mean?, then STEM is basically an acronym which is used to closely define 4 connected areas of study which are- Science, Technology, Engineering and Mathematics. All the four fields are very strongly associated with each other as they hold a lot of similarities, both practically and theoretically. The major fields from it are-
Science- Biology, Materials science, Chemistry and Physics
Mathematics- Statistics, General Mathematics and Actuarial Mathematics
Technology- Database Management, Computer Programming, Software Development & Web Development
Engineering- Nuclear Engineering, Computer Engineering, Aerospace Engineering & Petroleum Engineering