Quality Center (now Application Lifecycle Management/ALM) integrates with multiple HP/Micro Focus testing products. Win Runner scripts (A) can be connected to Quality Center for test management. LoadRunner scenarios (C) integrate for performance test tracking. QuickTest Professional scripts (D), later called UFT, integrate for functional test management. SiteScope (B) is primarily a monitoring tool and while it may have some integration capabilities, it's not typically listed as a core testing product that integrates with QC in the same way as the automation tools.