All(167), Audio(4), CGX(3), Coding(18), Cracking(9), Crypto(26), Encoding(17), Exploit(58), Forensics(1), Fun(10), HTTP(10), Image(8), Java(3), Linux(9), Logic(6), Math(6), MySQL(15), Network(1), PHP(27), Python(1), Realistic(6), Regex(2), Research(7), Shell(2), Simulated(1), Special(10), Stegano(24), Storyline(4), Training(39), Unknown(2), Warchall(11), Windows(1), XSS(2)