This digest is intended to provide the most relevant information pertaining to a selection of GSI/LID interventions frequently used in development in an easily understood format. As there is a broad range of applications for various strategies, this booklet demonstrates examples in four different categories where GSI/LID are likely to be implemented. As you will see on the Infrastructure Applications page, the four categories are represented by distinct icons. On the subsequent GSI/LID Interventions pages, the icons are used to indicate in which Infrastructure Application category the particular intervention is relevant and can typically be applied. Many of the interventions are applicable in all four categories. Others are highly specialized and may be appropriate only in particular categories.