To start understand any new subject, we need to understand its definitions. So to get ready for understanding the "Project Managements", we need to get the meanings for two words: project and managements. The two words have a several meanings, but we are going here to try find out its nearest meanings for the engineer. We must be sure also that all of us knew that there are several types of project depends on the method used for classification. So we are going to find out the most used types for our study without neglecting the importance for other types which may be used in other subjects.