For example, if the background process is acquiring data from instrumentation, and this data is been communicated in real time to the foreground process via {HEAD ~ the device driver mechanism} in {TAIL ~ 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 
in
For example , if the background process is acquiring data from instrumentation , and this data is been communicated in real time to the foreground process via { HEAD ~ the device driver mechanism } in { TAIL ~ 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
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