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As a junior in High School, you should be focused on keeping your options open right now and enjoying the learning experience. To decide now on what to choose as a career would probably cause you to close yourself off to other opportunities that can open up along the way. Focus on getting into the best college you can. You are tech savvy so computer science, engineering, etc should all be viable options. It's important though to also learn as much 'other' things along the way. Knowledge of the humanities could mean the difference between you being just like any other X science based major and you standing out from the crowd when it matters.