The aim of the thesis is to show how members use accounts of a collection of interactions to coordinate making available the possibility for relevant parties to coordinate doing those interactions as practical accomplishments. The empirical data consists in the texts of a Welcome Pack sent by Bangor University to the cohort of new first year undergraduate students. It is argued that a well as members using accounts to coordinate doing activities in interactions, members use organisational accounts as a medium of coordination for organising prospective interactions. It describes how this is used to make available the possibility of doing collections of interactions again, for another first time. It describes how members use account of interaction types, category types, and interaction types to do the preparatory work which makes available the possibility for members to coordinate doingactivities in interactions. The analysis explicates how Bangor University was used as the resource for how the interactions of Welcome Week weredoable as practical accomplishments. It therefore extendsEthno,ethodological investigations into how members use organisations as a resource to make available the possibility of doing activities in interactions, and how members use accounts of the availibility as a resource to indicate the prospective relevance of those interactions to them.