diff --git a/doc/owlps-client.t2t b/doc/owlps-client.t2t
index e8ce622..8aef82f 100644
--- a/doc/owlps-client.t2t
+++ b/doc/owlps-client.t2t
@@ -1,15 +1,16 @@
 Owl Positioning System Client
 OwlPS {{OWLPS_VERSION}}
-11 January 2013
+June 2013
 
 
 %%%
 % Man title & section:
 %!postproc(man): "^(\.TH.*) 1 "  ".TH owlps-client 1 "
 % Fix .TH, add NAME section and TABLE OF CONTENTS title:
-%!postproc(man): "^(\.TH.*)$"  "\1 OwlPS\ User\ Manual\n.SH NAME\nowlps-client - send positioning requests"
+%!postproc(man): "^(\.TH.*)$"  "\1 OwlPS\ User\ Manual\n.SH NAME\nowlps-client - send OwlPS positioning requests"
 % Man "links":
 %!preproc(man): "(owlps)\.t2t" "**\1**(7)"
+%!preproc(man): "(owlps-architecture)\.t2t" "**\1**(7)"
 %!preproc(man): "(owlps-deployment)\.t2t" "**\1**(7)"
 %!preproc(man): "(owlps-[^ ]*)\.t2t" "**\1**(1)"
 %!preproc(man): "(owlps-[^ ]*\.h)" "**\1**(3)"
@@ -33,7 +34,13 @@ OwlPS {{OWLPS_VERSION}}
 
 = Description =
 
-FIXME
+**OwlPS Client** is the reference client for OwlPS, i.e. the program run
+by the mobile terminals to send positioning requests. With the second
+invocation form, that is when the user provides the direction
+(orientation) and the coordinates of the mobile terminal,
+//owlps-client// will send calibration requests instead of positioning
+requests, which can be registered (using OwlPS Aggregator, see
+owlps-aggregator.t2t) to create a manual calibration database.
 
 
 
@@ -139,4 +146,4 @@ Where:
 
 = See also =
 
-owlps.t2t
+owlps.t2t, owlps-architecture.t2t