Rack system providing flexible configuration of computer systems with front access

A system for receiving and supporting a plurality of modules, comprising:

• a rack having a front side providing access to a plurality of chassis bays, each chassis bay being adapted to receive a chassis and align a back end of the chassis for blind docking with an electrical power source;
• a chassis received in a chassis bay and blind docked to an electrical power source, the chassis including a power supply, a fan, and a front side providing access to a plurality of module bays, each module bay configured to receive a module and align a back end of the module for blind docking with the power supply;
• a compute module received in a module bay and directly blind docked to the power supply, the compute module including a motherboard in communication with an input/output panel on a front side of the module;
• and
• at least one other module received in a module bay within the same chassis as the compute module and directly blind docked with the same power supply along with the compute module, wherein the at least one other module is interchangeably selected from the group consisting of a second compute module and an expansion module, wherein the expansion module includes one or more components selected from the group consisting of a hard disk drive, PCI card, or combinations thereof, and wherein the one or more components of the expansion module are controlled by the motherboard of the computer module within the same chassis.