Using modern platelet aggregometers, it is possible to evaluate platelet secretion simultaneously, by measuring release of ATP by the aggregating platelets. Measurement of platelet secretion allows the laboratory diagnosis of secretion defects with greater sensitivity than platelet aggregation testing alone.
Windows XP has long been an OS Microsoft begrudgingly kept alive far longer than it could have ever imagined. Initially released in 2001, official support for Windows XP persisted all the way through April 2014. At the time, Microsoft noted that after 13 years of support, it was time for the company to look forward, unencumbered by outdated software.
It is a part of the Windows NT family of operating systems. Windows 7 was released to manufacturing on 22 July 2009, and became generally available on 22 October 2009, less than three years after the release of its predecessor, Windows Vista.indows 7 was primarily intended to be an incremental upgrade to the operating system, intending to address Windows Vista's critical reception (such as performance improvements), while maintaining hardware and software compatibility.