Warning: this post won't be about "boring" or "typical" algorithms from Computer Science which we all have learned on studies (like quick sort, merge sort, xxx sort, A*, FFT). Instead, this will be about other little-known, especially USEFUL algorithms, which people working as professional developers should know or heard of. Little-known. ID generation problems are usually overlooked. Database ID's I mean. Ask someone to name ID "types". Well, GUID, newsequentialid...