Beyond the bread-and-butter singly linked list are dozens of practical Functional Data Structures available to mask complexity, enable composition, and open possibilities in pattern matching. This session focuses on data structures available today in F#, but has practical application to most any functional language. The session covers what makes these structures functional, when to use them, why to use them, choosing a structure, time complexity awareness, garbage collection, and practical insights into creating and profiling your own Functional Data Structure. This session is intended for intermediate level functional programmers and above, but should be of interest to functional programming newbies as well. Bibliography and demo F# code -- http://jackfoxy.com/svcc-fsharp-working-with-functional-data-structures-bibliograpy