This document discusses various real-world applications of discrete mathematics. It lists applications such as computer storage, Google Maps, delivery routing, scheduling problems, cryptography, cybersecurity, railway planning, robotic arms, DNA sequencing, computer graphics, electronic health records, traffic modeling, cell phone communications, machine job scheduling, power grids, kidney matching, climate change modeling, digital image processing, compact discs, archaeology, medical science, voting systems, food webs, and more. The document provides an introduction and references for further information.