The Hierarchically Tiled Array or HTA data type is a class designed to facilitate the writing of programs based on tiles in object-oriented languages. HTAs allow to exploit locality as well as to express parallelism with much less effort than other approaches. Implementations of the HTA have been developed for C++ and MATLAB, with the parallel backend running on MPI. A C++ version for shared-memory systems based on Intel® Threading Building Blocks (TBB) has been developed recently.