On November 27, 1852, Augusta Ada King, Countess of Lovelace, who is considered to be the world's very first programmer, passed away. Every student of computer science should have heart of the world's first programmer, Ada Countess of Lovelace, assistant to Charles Babbage, inventor of the very first programmable (mechanical) computer, the analytical engine.
What’s easy for a computer to do, and what’s almost impossible? Those questions form the core of computational complexity. We present a map of the landscape: P, NP, etc.