A suite of tools that enables software developers, independent software vendors (ISVs), and enterprise IT professionals to determine whether their applications are compatible with a new version of Windows before rolling it out to the company. ACT also enables such individuals to determine how Windows security updates may impact their applications.
a main division within the plot of a film; a film is often divided by 'plot points' (places of dramatic change) rather than acts; long films are divided mid-way with an intermission