The article focuses on the changing face of computer programming. Most computer programmers worked with the help of things called "programming guages" that didn't have much to do with what the programmer was actually working on. The programmer had to work out all instructions for the program in advance, without being able to see what any of them did. If the programmer didn't get the syntax exactly right, then nothing would work out. Over years, small but dedicated group of researchers came to perceive the difficulty and developed a radically different approach to programming, called "programming by example (PBE)." One way PBE departs from conventional software is how it applies new techniques from artificial intelligence and machine learning. Incorporating these techniques represents a tremendous opportunity for PBE but incurs the risk that the system will make unwanted generalizations. Computer programmers treat the thorny issue of how much intelligence a PBE system should have from their wide experience building intelligence into PBE systems