Patricia Trie, also known as a radix tree or compact prefix tree, is a data structure used to store a set of strings in a space-efficient manner by combining common prefixes. It is particularly effective for applications that require fast lookups, insertions, and deletions, such as in IP routing tables or autocomplete systems.
Autocomplete is a feature in computing that predicts the rest of a word or phrase a user is typing, based on previously entered data or a linguistic model. It enhances user efficiency by reducing keystrokes and minimizing errors in text entry across various applications such as search engines, messaging apps, and code editors.