The main goal of the course is to introduce the students to the capabilities of the crowd to share and process data that for solving problems which are still complex for the computer system, and at the same time, very simple for a collective with human intelligence. The students will get acquainted with new design of applications and concept of programming based on unreliable contribution of vast number of individuals in a crowd. The course will give an overview of the existing platforms for data collections and on demand task solving.