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Semantic Web Topics

OWL Web Ontology Language Semantics and Abstract Syntax

OWL Web Ontology Language Reference

Algorithm

Sorting Algorithm

Sort Algorithm on Wikipedia
Good starting point of sorting algorithms. You can get some quick facts about sort algorithms.

Theory of Computation & Complexity

NP-complete

List of NP-complete problems
Can you find which one is the hardest?

Deep insight of P vs NP

P vs NP
One simple survey.

Letter from Gödel to von Neumann
The letter from Gödel to von Neumann. Both of whom are great figures.