Hashed Array Tree - sgml/signature GitHub Wiki http://bearcave.com/software/vhdl/doc/classHat.html https://concatenative.org/wiki/view/Exotic%20Data%20Structures https://www.keithschwarz.com/interesting/code/?dir=hashed-array-tree https://stackoverflow.com/questions/16088606/whats-the-name-of-this-array-data-structure