Abstract: End-user programming refers to programming activities carried out by end users. These end-users can include teachers, accountants, scientists, engineers, parents and all other people who are not trained as programmers. End-user programming is now getting more popular. It was projected that the number of end-user programmers in the US is about 55 million compared to 2.75 million professional programmers. In order to support end-user programming, a number of programming systems have been developed which can be divided into the following categories: Application-specific languages, programming by example, visual programming and natural programming. This study discusses the concept of a new programming system to support end-user programming called the block-based programming system. In this programming environment, end-users can develop applications by integrated programming blocks that have been developed by block developers.