The story
Coined by Donald R. Morrison in 1968, as an acronym of practical algorithm to retrieve information coded in alphanumeric, designed to spell out the name Patricia.
Etymology from Wiktionary, CC BY-SA 4.0.
Patricia tree
Today it means: A radix tree with radix of 2, meaning that each bit of the key is compared individually and each node is a two-way branch. Full definition →