diff --git a/ForumApp.markdown b/ForumApp.markdown
index 2fc894e..4931aa5 100644
--- a/ForumApp.markdown
+++ b/ForumApp.markdown
@@ -1,4 +1,4 @@
-ForumApp is a [BSP application](BSP) that synchronises forum posts among groups of devices. Any member of a forum can invite non-members to join, and any member can write posts.
+ForumApp is a [BSP application](BSP) that synchronises forum posts among groups of devices. Any subscriber to a forum can invite new subscribers, and any subscriber can post to the forum.
 
 ### Channel identifiers
 
@@ -14,7 +14,7 @@ The application identifer is random:
 
 **0: INVITATION** - The content is a BDF list with three elements: `forum` (list) and `note` (string, may be null). `forum` is a list with two elements, `name` and `salt`, as described above. `note` is an optional note from the inviter to the invitee.
 
-**1: RESPONSE** - The content is a BDF list with three elements: `invitation_id` (raw), `decision` (boolean), and `note` (string, may be null). `invitation_id` is the identifier of an invitation created by the opposite peer. `decision` indicates whether the invitee wishes to join the forum. `note` is an optional note from the invitee to the inviter.
+**1: RESPONSE** - The content is a BDF list with three elements: `invitation_id` (raw), `decision` (boolean), and `note` (string, may be null). `invitation_id` is the identifier of an invitation created by the opposite peer. `decision` indicates whether the invitee wishes to subscribe. `note` is an optional note from the invitee to the inviter.
 
 **2: DEPARTURE** - The content is a BDF list with one element: `invitation_id` (raw), which is the identifier of an invitation created by either peer.
 
@@ -43,8 +43,8 @@ For the invitation channel:
 * All remote messages are stored.
 
 For forum channels:
-* Local messages are stored while the local peer belongs to the forum.
-* Remote messages are stored while the local peer belongs to the forum.
+* Local messages are stored while the local peer subscribes to the forum.
+* Remote messages are stored while the local peer subscribes to the forum.
 
 ### Sharing policy
 
@@ -53,5 +53,5 @@ For the invitation channel:
 * Each remote message is shared with the remote peer that created it.
 
 For forum channels:
-* Local messages are shared with all remote peers that belong to the forum.
-* Remote messages are shared with all remote peers that belong to the forum.
+* Local messages are shared with all remote peers that subscribe to the forum.
+* Remote messages are shared with all remote peers that subscribe to the forum.