Example image of eyePlorer eyePlorer map for 'POSIX': Application programming interface Institute of Electrical and Electronics Engineers Operating system Standardization Unix International Electrotechnical Commission International Organization for Standardization Richard Stallman Command-line interface Command-line interpreter Korn shell AWK Computer file Computer network Computer terminal Echo (command) Ed (text editor) Output Thread (computer science) Austin Group Working group ANSI C POSIX Threads Single UNIX Specification Df (Unix) Du (Unix) GNU Linux QNX RTEMS VxWorks Cygwin Linux Standard Base Microsoft Windows Microsoft POSIX subsystem Microsoft Windows Services for UNIX UWIN 2 DJGPP DOS EMX (programming environment) ECos Architecture of Windows NT OpenVMS Plan 9 from Bell Labs Symbian Windows 2000 IGI Global Interix TRON Project