Proper noun
Cygwin
(computing) A POSIX-compatible environment that runs natively on Microsoft Windows.
Cygwin's default user interface is the bash shell running in the Cygwin console. Source: Internet
Cygwin programs are installed by running Cygwin's "setup" program, which downloads the necessary program and feature package files from repositories on the Internet. Source: Internet
Cygwin also recognises NTFS junction points and symbolic links and treats them as POSIX symbolic links, but it does not create them as their semantics are not fully POSIX-compliant. Source: Internet
Cygwin provides a Unix-like environment on Windows, and both Perl and CPAN are available as standard pre-compiled packages in the Cygwin setup program. Source: Internet
Cygwin provides native integration of Windows-based applications, data, and other system resources with applications, software tools, and data of the Unix-like environment. Source: Internet
Cygwin is used heavily for porting many popular pieces of software to the Windows platform. Source: Internet