A microelectronic programmable structure and methods of forming and programming the structure are disclosed. 2, where A indicates the width of the spacer loading region and B indicates the pitch of the unit pixels located along the width of the spacer loading region. The compartment structure extends from at least one side edge of the LED assembly to at least one side edge of the optical element assembly, so that the LED assembly, the optical element assembly and the compartment structure form an enclosed space corporately. At low voltages, the instant invention exceeds the capability of conventional systems. Other embodiments are disclosed. Distributed clients access the server, to learn about changes made to the files on the server, and to push local changes of the files onto the server.