diff --git a/doc/console.drawio b/doc/console.drawio
new file mode 100644
index 0000000..0469ca3
--- /dev/null
+++ b/doc/console.drawio
@@ -0,0 +1 @@
+<mxfile host="Electron" modified="2023-03-13T23:21:20.375Z" agent="5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) draw.io/20.8.16 Chrome/106.0.5249.199 Electron/21.3.5 Safari/537.36" etag="Z2Mfk2ZBbl7WkBZ1-Pcz" version="20.8.16" type="device"><diagram name="Page-1" id="LQ51MIGZ5u8MJkVY-xBH">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</diagram></mxfile>
\ No newline at end of file
diff --git a/doc/console.drawio.png b/doc/console.drawio.png
new file mode 100644
index 0000000..8b71055
Binary files /dev/null and b/doc/console.drawio.png differ
diff --git a/doc/console.odp b/doc/console.odp
new file mode 100644
index 0000000..8cba0aa
Binary files /dev/null and b/doc/console.odp differ
diff --git a/doc/console.pptx b/doc/console.pptx
new file mode 100644
index 0000000..c3caecb
Binary files /dev/null and b/doc/console.pptx differ
diff --git a/doc/deck_example.ml b/doc/deck_example.ml
new file mode 100644
index 0000000..c5405f5
--- /dev/null
+++ b/doc/deck_example.ml
@@ -0,0 +1,17 @@
+let rec copy_blocks buffer r w =
+  match%lwt Lwt_io.read_into r buffer 0 (Bytes.length buffer) with
+  | 0 -> Lwt.return_unit
+  | bytes_read ->
+    let%lwt () = Lwt_io.write_from_exactly w buffer 0 bytes_read in
+    copy_blocks buffer r w
+
+let run () =
+  ((let%lwt server =
+      Lwt_io.establish_server (Lwt_unix.ADDR_INET (Unix.inet_addr_any, 8765))
+        (fun (r, w) ->
+           let buffer = Bytes.create (16 * 1024) in
+           copy_blocks buffer r w)
+    in
+    Lwt.return server) : Lwt_io.server Lwt.t) |> ignore
+
+let () =  Lwt_main.run   run ();
diff --git a/doc/factorial.drawio b/doc/factorial.drawio
new file mode 100644
index 0000000..fca9155
--- /dev/null
+++ b/doc/factorial.drawio
@@ -0,0 +1 @@
+<mxfile host="Electron" modified="2023-03-14T02:21:12.395Z" agent="5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) draw.io/20.8.16 Chrome/106.0.5249.199 Electron/21.3.5 Safari/537.36" etag="kySTQQLOUsgllAWFhiTX" version="20.8.16" type="device"><diagram name="Page-1" id="LQ51MIGZ5u8MJkVY-xBH">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</diagram></mxfile>
\ No newline at end of file
diff --git a/doc/factorial.drawio.png b/doc/factorial.drawio.png
new file mode 100644
index 0000000..f468b85
Binary files /dev/null and b/doc/factorial.drawio.png differ