Figure 3

Three representations of usage data. This plot illustrates worldwide usage of the QMachine web service from log data collected from April 2013 to April 2014. More than 2.2 million calls were made to its Application Programming Interface (API), the details for which are shown in Table 1. The thin, solid curve represents the number of calls made to its Application Programming Interface (API) server by hour; QM was idle (no calls received) during approximately 79% of all one-hour periods, and those hours were omitted. The thin, dashed line represents the number of API calls aggregated by IP address. The thick, dashed line represents the number of API calls made to a particular “box” on QM; see the Results section for further details about QM’s boxes.