A computer numerically controlled machine comprising: a moveable head capable of delivering electromagnetic energy to effect one or more changes in a material within an interior space of the computer numerically controlled machine ; an Internet connection over which the numerical controlled machine receives data, wherein the Internet connection is lossy, has a variable latency, and/or has a variable bandwidth, and a control unit configured to : enable an operation of the computer numerically controlled machine using an execution plan delivered to the computer numerically controlled machine over the Internet connection , the execution plan comprising a set of actions necessary to effect the one or more changes in the material , and receive at least a portion of the execution plan characterized in that the control unit is further configured to cause the movable head to execute the set of actions comprised in the execution plan in response to determining that the execution plan has been received up to and including a predefined safe pausing point indicating that the execution plan can be paused and restarted with a minimal difference in an appearance of a finished work-product relative to if a pause and restart are not necessary. a moveable head capable of delivering electromagnetic energy to effect one or more changes in a material within an interior space of the computer numerically controlled machine ; an Internet connection over which the numerical controlled machine receives data, wherein the Internet connection is lossy, has a variable latency, and/or has a variable bandwidth, and a control unit configured to : enable an operation of the computer numerically controlled machine using an execution plan delivered to the computer numerically controlled machine over the Internet connection , the execution plan comprising a set of actions necessary to effect the one or more changes in the material , and receive at least a portion of the execution plan characterized in that the control unit is further configured to cause the movable head to execute the set of actions comprised in the execution plan in response to determining that the execution plan has been received up to and including a predefined safe pausing point indicating that the execution plan can be paused and restarted with a minimal difference in an appearance of a finished work-product relative to if a pause and restart are not necessary. enable an operation of the computer numerically controlled machine using an execution plan delivered to the computer numerically controlled machine over the Internet connection , the execution plan comprising a set of actions necessary to effect the one or more changes in the material , and receive at least a portion of the execution plan characterized in that the control unit is further configured to cause the movable head to execute the set of actions comprised in the execution plan in response to determining that the execution plan has been received up to and including a predefined safe pausing point indicating that the execution plan can be paused and restarted with a minimal difference in an appearance of a finished work-product relative to if a pause and restart are not necessary. <EOS>