The DEC Text Processing Utility (or DECTPU)[1][2] is a dedicated programming language developed by Digital Equipment Corporation (DEC) to easily create multi-functional text editors.
TPU is part of OpenVMS. It can be used on a terminal, a console, or on a graphical system like DECwindows.
TPU provides text buffer management APIs in concert with window management APIs which are targeted for the VT100 line of terminals.[citation needed] This allowed split-screen windows with scrolling and hence multiple views of the same buffer content.[citation needed] There are also key mapping APIs provided, allowing a wide range of functionality for editing text. The keyboard mapping could be easily adapted by the admin or the user.[citation needed]
Users could write their own specific editor, to e.g. translate text or short (error) messages to multiple natural languages in a synchronised small text window. The text editor is callable, so you could have small text editors built into specific applications, e.g. a simple mail client. You might redirect output from applications into a text window, using inter-process communication. Therefore one could call web services to return their results into a text buffer.