Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Yaim is a software to configure Grid services, but YAIM also can be used as a general purpose configuration tool completely independent from the Grid middleware. The aim of YAIM is to provide simple configuration methods that can be used to set up uniform Grid sites but can also be easily adapted to meet the needs of larger sites. To ensure that all system administrators can adapt YAIM to the local requirements, it has been implemented as a set of bash scripts. To support EGEE''s component based release model YAIM 4 has been modularized and a YAIM core is supplemented by component specific scripts, distributed as separate rpms.