SciTECO is an interactive, visual clone of the venerable TECO editor, written using the Scintilla toolkit. A visual editor is one that allows changes to a text document to be seen immediately; another example of a visual text editor is Vim. Although TECO is a direct ancestor to Emacs (which, in its original form, was a set of editor macros for TECO), SciTECO arguably shares more in common with Vim.