{TAIL ~ The memory package} may also include a memory die having an optical input/output section and {HEAD ~ a second optical window} 
{ TAIL ~ The memory package } may also include a memory die having an optical input / output section and { HEAD ~ a second optical window }
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD