diff --git a/documentation/about.inc b/documentation/about.inc
index d1a3f32fb7387a5f7a14b337b784b089573ea0d8..d23ba1acd1e8f6de2fad3c8027dae35d54745e90 100644
--- a/documentation/about.inc
+++ b/documentation/about.inc
@@ -8,10 +8,10 @@ accelerators and telescopes.
 The state notation language *SNL* allows programming sequential
 operations that interact with EPICS process variables without the usual
 complexity involved with task scheduling, semaphores, event handling,
-and I/O programming. The language is a restricted subset if C, enhanced
+and I/O programming. The language is a restricted subset of C, enhanced
 with extra syntax for descibing state sets, states, state transitions,
-and the binding of program variables to named process variables. See
-the :doc:`Tutorial` for a gentle introduction.
+and the binding of program variables to named and anonymous process
+variables. See the :doc:`Tutorial` for a gentle introduction.
 
 From the SNL source code, the SNL compiler *snc* generates a number of
 C code procedures that are called by the run-time sequencer, a C