you need to give the computer, or the turtle in this case, a label. use the command: label set <name>
When you break the machine the label you gave shows up on the hover over window, and after placed back somewhere it has the same programs it had before
When you put an item that is classified as matter ex. diamonds, wood, stone it locks to matter mode, meaning you can only transmute matter to other matter. Same with fuel, you can only transmute coal to other types of fuel