https://www.reuters.com/article/us-ibm-results/ibm-revenue-misses-as-server-software-sales-slow-idUSKCN1MQ2R8 >IBM Corp reported a bigger-than-expected drop in revenue on Tuesday, hit by slowing software sales and wavering demand for mainframe servers, pointing to a bumpy recovery for the technology services giant that is in the midst of a turnaround.