Utilizing these sorting algorithms, a search algorithm that incorporates presorting will yield these big-O efficiencies. Services include printing, personalization and presorting of acknowledgements, bills and renewals. Presorting is the technique of sorting an input before attempting to search it. Now compare this to a similar algorithm that utilizes presorting. This simple example demonstrates what is capable with an input enhancement technique such as presorting. Unfortunately, presorting is usually the slowest component of the algorithm.