ActivePerl is a distribution of Perl from ActiveState (formerly part of Sophos) for Windows, macOS, Linux, Solaris, AIX and HP-UX.
The Windows version includes an Active Scripting component for Windows Script Host (WSH) called PerlScript and an ISAPI module for embedding within Internet Information Services (IIS).
PerlScript was initially solely an ActiveX Scripting Engine produced by the company ActiveState for use with Microsoft's Internet Information Services (IIS) that allows for programmers to use Perl-based code in addition to, or in place of, VBScript or JScript in the context of web servers running the ASP protocol.
PerlScript can also be used to write Windows Script Host-based programs, similar to VBScript.
PerlScripts which have the extension wsf require XML tags which specify the job id and script language, e.g. wsf PerlScripts gain access to WSH drag and drop functionality, similarly to Perl Droplets in the now-obsolete MacPerl.