When I was in high school I was a newbie programmer, learning Python, Javascript and PHP with an intent to learn web development. Now I'm in college studying Electrical and Computer Engineering, learning calculus and C (still a newbie programmer). I also like to run Linux distros, especially Ubuntu derived ones.
Stack Overflow
Q&A for professional and enthusiast programmers
Mathematics
Q&A for people studying math at any level and professionals in related fields
Electrical Engineering
Q&A for electronics and electrical engineering professionals, students, and enthusiasts
Signal Processing
Q&A for practitioners of the art and science of signal, image and video processing
Super User
Q&A for computer enthusiasts and power users
Ask Ubuntu
Q&A for Ubuntu users and developers
Software Engineering
Q&A for professionals, academics, and students working within the systems development life cycle
Cryptography
Q&A for software developers, mathematicians and others interested in cryptography
Information Security
Q&A for information security professionals
Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems
CS50
Q&A for students of Harvard University's CS50
Reverse Engineering
Q&A for researchers and developers who explore the principles of a system through analysis of its structure, function, and operation