diff --git a/README.md b/README.md
index 08e56e21..e9573df6 100644
--- a/README.md
+++ b/README.md
@@ -140,10 +140,6 @@ contents.
   Write to _file_ the text supplied as the _content_ parameter.
   This can be either a string, or an array of strings.
 
-- `runfile(file)`
-
-  Run _file_ if it's a lua script.
-
 ## Editor
 
 If a project is open, the files inside can be edited or new ones
diff --git a/doc/intro.md b/doc/intro.md
new file mode 100644
index 00000000..5dc5d240
--- /dev/null
+++ b/doc/intro.md
@@ -0,0 +1,53 @@
+# Introduction to Compy
+
+Compy is a 7'' portable educational computer with an interactive development 
+environment for the [love2d](https://love2d.org) framework. It runs on top of 
+Android operating system and uses the Lua programming language for the command 
+line, scripting, configuration and programming. The primary interface is the 
+command console, with the standard input displayed at the bottom of the screen, 
+with real-time syntax highlingting (when appropriate). The standard output is 
+displayed on a terminal occupying the rest of the screen, which also doubles as 
+a graphical canvas. Thus, commands with both text-based or graphical output can 
+be entered. Below are some invariant principles of operations:
+
+* Pointing devices (such as mice, touch pad or touch screen) might be used, but 
+  are not necessary for the successful operation of Compy.
+* Apart from syntax highlighting, anything entered in the console 
+  input will only take effect upon pressing the **Enter** key.
+* If the input is syntactically invalid at the time of pressing **Enter**, the
+  user can continue editing, correcting the mistake.
+* Users cannot render compy unusable from the command line. Compy can always 
+  be restored to its initial state by inserting a clean _SD card_ or formatting
+  the currently inserted one. Example projects are written onto the SD card by
+  entering `example_projects()` on the command line.
+
+## Persistence
+
+All data persisted by the user is saved on the included _SD card_. It is 
+organized into named _projects_, with no file system hieararchy. Technically, 
+each project is a directory under `Documents/compy/projects/` on the SD card. 
+Inside these directories, there is no further directory structure.
+
+Projects can be selected or, in the absence of one, created by entering 
+`project("...")` in the console, with the project's name between the double 
+quotes. Running the project means executing a file called "`main.lua`" in its 
+directory. It can be done by entering `run()` in the console for the currently 
+selected project or `run("...")` for a different project, with the name of the 
+project between the double quotes.
+
+Text files, including Lua sources can be edited using the built-in text editor 
+that can be started by entering `edit("...")` in the console, with the name of 
+the file between the quotes. In its absence, `main.lua` will be edited.
+
+No changes to the edited file will occur unless the user presses **Enter** _and_ 
+the text in the edit area at the bottom of the screen is syntactically correct. 
+Pressing **Enter** takes immediate effect on the SD card, there is no need to 
+"save" the edited file separately.
+
+If there is no highlighted section in the edited file, the text inputed in the 
+console will be appended to the end of the file. If there is a bright white 
+highlight, the entered text is inserted before it. If there is a bright yellow 
+highlight, the entered text replaces it.
+
+For more information, please see the documentation of the [editor](EDITOR.md) 
+and the [console](../README.md).
diff --git a/src/controller/consoleController.lua b/src/controller/consoleController.lua
index 8cb2f51c..a560c8c1 100644
--- a/src/controller/consoleController.lua
+++ b/src/controller/consoleController.lua
@@ -310,18 +310,6 @@ function ConsoleController.prepare_env(cc)
     end)
   end
 
-  --- @param name string
-  --- @return any
-  prepared.runfile          = function(name)
-    local code = check_open_pr(cc._readfile, cc, name)
-    local chunk, err = load(code, '', 't')
-    if chunk then
-      chunk()
-    else
-      print(err)
-    end
-  end
-
   --- @param name string
   prepared.edit             = function(name)
     return check_open_pr(cc.edit, cc, name)