Hardware is the set of cogs that makes the system operate. If a company wants to deploy software, it will require hardware to deploy it on. Purchasing expensive servers with highest specifications can be the choice for most companies in this case. However, knowing the software and hardware requirements and the estimated usage can help the company make smart decisions, save a lot of money, and have a system that runs efficiently and effectively. If you have a maximum of 500 users combined, it is costly and inefficient to purchase hardware that can serve 5,000 users. This section is dedicated to guide you to pick the hardware you need and distribute it carefully so that ArcGIS for Server can comfortably serve your maximum users.