For example, if {TAIL ~ the background process} is acquiring data from instrumentation, and {HEAD ~ this data} is been communicated in real time to the foreground process via the device driver mechanism in accordance with the invention, the interface routine in the background program can be programmed to wait until a requested item of data has been received and placed in temporary storage before yielding control back to the foreground process 
For example , if { TAIL ~ the background process } is acquiring data from instrumentation , and { HEAD ~ this data } is been communicated in real time to the foreground process via the device driver mechanism in accordance with the invention , the interface routine in the background program can be programmed to wait until a requested item of data has been received and placed in temporary storage before yielding control back to the foreground process
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH