--- a/terminal.rst	Thu Sep 02 16:45:59 2010 +0300
+++ b/terminal.rst	Mon Sep 06 23:08:24 2010 +0300
@@ -1,14 +1,41 @@
 -*- outline -*-
 
+* Spec.
+
+  http://en.wikipedia.org/wiki/C0_and_C1_control_codes
+  http://en.wikipedia.org/wiki/ECMA-48
+                ANSI escape sequences
+
+* Old hardware terminal.
+
+** VT102.
+
+VT100 is a video terminal that was made by Digital Equipment Corporation (DEC). It was introduced in
+August 1978. Its detailed attributes became the de facto standard for terminal emulators.
+
+The control sequences used by the VT100 family are based on the ANSI X3.64 standard, later ECMA-48
+and ISO/IEC 6429.
+
+The VT101 and VT102 were cost-reduced non-expandable follow-on products, with the VT102 including
+the AVO and serial printer port options of the VT100.
+
+In 1983, the VT100 was replaced by the more-powerful VT200 series terminals such as the VT220.
+
+  http://en.wikipedia.org/wiki/VT102
+
+** VT220.
+
+  http://en.wikipedia.org/wiki/VT220
+
 * X window pseudo terminal.
 
 ** luit.
 
 Luit is a filter that can be run between an arbitrary application and a UTF-8
-terminal emulator. It will convert application output from the locale’s
-encoding into UTF-8, and convert terminal input from UTF-8 into the locale’s
+terminal emulator. It will convert application output from the locale's
+encoding into UTF-8, and convert terminal input from UTF-8 into the locale's
 encoding.
 
 Example:
 
-  $ luit -encoding ’ISO 8859-1’ emacs -nw
+  $ luit -encoding 'ISO 8859-1' emacs -nw