    twm (tab window manager) is a window manager for the x window system. started in 1987 by tom lastrange, it has been the standard window manager for the x window system since version x11r4. the name originally stood for tom's window manager, but the software was renamed tab window manager by the x consortium when they adopted it in 1989. twm is a re-parenting window manager that provides title bars, shaped windows and icon management. it is highly configurable and extensible. twm was a breakthrough achievement in its time, but it has been largely superseded by other window managers which, unlike twm, use a widget toolkit rather than writing directly against xlib. various other window managersâsuch as vtwm, tvtwm, ctwm, and fvwmâwere built on twm's source code. twm is still standard with both x.org server and xfree86, and is available as part of many x implementations. ==using twm==  thumb|twm menu  twm's interface is different from modern common x window managers and desktop environments all of which tend to work similarly to the apple macintosh or microsoft windows. new users often find twm difficult without reading the manual page.twm&nbsp;â tab window manager for the x window system&nbsp;â man page, x11 release 7.6 (x.org) in the default configuration of twm, the title bar has two buttons: *resize button (nested squares): the user clicks here, drags the mouse pointer to the edge to be moved, then releases when the window is the desired size. *iconify button (circle): reduces the window to an icon. there is no title bar button to close a window. a left click on the desktop brings up a menu, which includes an option to delete (close) a window. window close functionality for the titlebar can be configured in the .twmrc file:see . a l
1987_software Free_X_window_managers Software_using_the_MIT_license