Blade servers are self-contained servers embedded in dense, ultra-thin printed circuit boards (PCBs) called blades. A chassis called a razor houses the blades, which are usually proprietary and not interchangeable with another manufacturer’s devices. Blades increase the capacity of industry-standard data center racks because they require less room than other PCBs. Blade servers reduce computing costs by sharing important components such as power supplies, cooling fans, and network interfaces. Blade servers also require fewer cables, simplifying the work of system and network administrators.