Range search is a technique used in computer science and data analysis to find all items within a specified range of values. For example, if you have a list of numbers and want to find all numbers between 10 and 20, a range search will efficiently identify and return those values. This method is commonly applied in databases and search algorithms. In many applications, such as geographic information systems or data mining, range search helps users quickly locate relevant data points. It can be implemented using various data structures, including binary search trees and k-d trees, which optimize the search process for large datasets.