In one embodiment, {HEAD ~ a cold storage system} for biological samples has one or more freezers, each freezer having one or racks, {TAIL ~ each rack} receiving one or more boxes, each box receiving one or more sample containers 
In one embodiment , { HEAD ~ a cold storage system } for biological samples has one or more freezers , each freezer having one or racks , { TAIL ~ each rack } receiving one or more boxes , each box receiving one or more sample containers
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH