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+Screen is a full-screen window manager that multiplexes a physical terminal
+between several processes (typically interactive shells).
+Each virtual terminal provides the functions of a DEC VT100 terminal and, in
+addition, several control functions from the ANSI X3.64 (ISO 6429) and ISO
+2022 standards (e.g. insert/delete line and support for multiple character
+sets). There is a scrollback history buffer for each virtual terminal and a
+copy-and-paste mechanism that allows moving text regions between windows.