Computer servers for business or industrial usage. Typically these systems have redundant components, extra upgrade capacity, high performance characteristics, hot-swappable components (such as SCSI hard drives and power supplies) and optional rack mountability.
For example:
Dell PowerEdge Servers
HP Proliant Servers
Compaq Proliant Servers
IBM Netfinity Servers
IBM eServer xSeries Servers
Dell 2P282 Power Edge 2500 Tower to Rack Conversion Kit - New Open Box
This kit can be used to convert a Power Edge 2500 from tower configuration to rack mount. The front cover and face plate for the Power Edge 2500 is included.