For the trail of the Cambridge Museum of Technology, we've divided the spaces into eleven stops. Each stop is offered as a transcription (see below) illustrated for those who are not able-bodied to see the details of the site through descriptions and photography.  You can use the audio guide online or in situ which is provided freely here, stop by stop, starting with CLOCKING-IN CORRIDOR (CMT Trail stop 7) AUDIO.

CMT TRAIL STOP 7 WORDS SPOKEN BY CAMBRIDGE MUSEUM OF TECHNOLOGY'S CURATOR, PAM HALLS: Right, we’re going  to go back through the door now and head off towards the Boiler Room but before we get there we are going to find the clocking-in machine.  We are actually going to look at the one on the left and although it wasn't actually used here it is the sort of thing that workers in industrial buildings all around Cambridge would have used to clock in and so they brought a card and they would put it into the machine into this slot here on the left then you would press the lever here on the right and this would stamp the time of your arrival on the card and then when you left in the evening you would take your card,  insert it in the slot again,  pull the lever and it was stamped the time that you had left work so that your boss could work out how much money to pay you.