EVE (introduced as the Extensible VAX Editor,[1][2][3] later[4] as the Extensible Versatile Editor[5]) is a flexible text editor that is part of the VMS operating system.[6] EVE is implemented by using the Text Processing Utility (TPU).[7]
The Emacs editor features an EVE emulation (as an add-on).[8]
User's guide to EVE