Three courses,step by step.

Study Hub is a study platform for three university CS courses (formal languages, data structures, and database systems) with problems, three-depth solutions, explanations, and handwritten notes pre-authored as MDX. The theory that actually moves is interactive: DFA, NFA, PDA, and Turing-machine graphs you step through one symbol at a time, parse tables, grammar transforms, and sorting and schema visualizers, all offline and key-free.