This research focused on making applications to determine the dominant multiple intelligences. Everyone has eight different intelligences that reflect different ways of interacting with the world. The dominant multiple intelligence needs to be known so that the child's growth and development is in accordance with his or her talents and interests. Therefore, it is necessary to make an application with tools that have been tested by experts, which can determine the level of intelligence so that the potential of children can be developed. This application was created using the extreme Programming software development method. The reasons for the choice of this method were because the resources to create the application were readily available, the programming was conducted by a small team, and the application development time was short. This application used the PHP and MySQL by displaying a list of 24 questions that had to be filled out by the users. The application testing method used black box testing. The accuracy of the application was 100% from 150 respondents who used this application. The output of this application is a sequence of multiple intelligences owned by users ranging from linguistic, logical-mathematical, musical, spatial, kinaesthetic, intrapersonal, interpersonal abilities, and naturalist.

Communication is the process of sending and receiving messages that involve at least two people so that the message can be understood. The existence of effective communication results in a good relationship between the sender and recipient of the message. Meanwhile, miscommunication can lead to relationship breakdown. The way a person communicates is largely influenced by his personality. Communication is more effective by looking at his personality. Personality directly affects interpersonal communication and this communication affects organizational commitment. One way to find out a person's personality typology is to fill in personality observations based on the fields that have been determined by the expert. The purpose of this study is to develop a personality typology application that can be used to identify a person's personality typology. The existence of this application is expected to help realizing effective communication because someone knows the typology of his personality that can be used to communicate with his interlocutors. The software development method used is eXtreme Programming. This method was chosen because the resources to make the system were available, application development time was short, and programming was done by a small team. The making of this personality typology application can be used by someone to identify personality typologies that can produce choleric, sanguine, melancholic, and phlegmatic classification outputs. This application is created using the PHP programming language and MySQL Database Management System by displaying a list of 24 questions that must be filled in by the user. The application using black box testing, accuracy value is 100%. The existence of this application is expected to create a comfortable working atmosphere and create smooth communication with all parties. This has an impact on the effectiveness of communication so that it can reduce communication misunderstandings.