July 27 (Reuters) - Spok Holdings Inc SPOK.O
* Spok reports 2016 second quarter operating results;
software bookings increase, wireless trends improve
* Q2 earnings per share $0.17
* Q2 revenue $44.6 million versus $48 million
* Says software bookings for 2016 Q2 were $20.1 mln, in-line
with prior year quarter
* Spok Holdings Inc says maintaining 2016 guidance range
* Spok Holdings Inc says Q2 bookings included $10.2 million
of operations bookings and $9.9 million of maintenance renewals
* Spok Holdings Inc says software backlog totaled $39.5
million at June 30, 2016, up from $36.8 million in prior quarter
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