For example, the data entry system 105 may include one or more general purpose computers , {TAIL ~ one or more special purpose computers} , or a combination of {HEAD ~ one or more general purpose computers} and one or more special purpose computers 
For example , the data entry system 105 may include one or more general purpose computers , { TAIL ~ one or more special purpose computers } , or a combination of { HEAD ~ one or more general purpose computers } and one or more special purpose computers
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH