diff --git a/78.md b/78.md
index abdd1b21..7ad50f33 100644
--- a/78.md
+++ b/78.md
@@ -12,7 +12,9 @@ Even though interoperability is great, some apps do not want or do not need inte
 
 ## Nostr event
 
-This NIP specifies the use of event kind `30078` (an _addressable_ event) with a `d` tag containing some reference to the app name and context -- or any other arbitrary string. `content` and other `tags` can be anything or in any format.
+This NIP specifies the use of event kinds `30078` (an _addressable_ event) with a `d` tag containing some reference to the app name and context -- or any other arbitrary string. `content` and other `tags` can be anything or in any format.
+
+It also defines the kind `78` (a _normal_ event) for when the app needs to store and query multiple events of the same type. Apps should use some unique tag (even a `d` tag) for grouping these events together.
 
 ## Some use cases
 
diff --git a/README.md b/README.md
index 03ace785..d77e4090 100644
--- a/README.md
+++ b/README.md
@@ -152,9 +152,10 @@ This table is not exhaustive. For a machine-readable registry of all known event
 | `54`          | Podcast Episode                 | [F4](F4.md)                            |
 | `62`          | Request to Vanish               | [62](62.md)                            |
 | `64`          | Chess (PGN)                     | [64](64.md)                            |
-| `443`         | KeyPackage                      | [Marmot][marmot]                       |
-| `444`         | Welcome Message                 | [Marmot][marmot]                       |
-| `445`         | Group Event                     | [Marmot][marmot]                       |
+| `78`          | Application-specific Data       | [78](78.md)                            |
+| `443`         | KeyPackage                      | [Marmot](marmot)                       |
+| `444`         | Welcome Message                 | [Marmot](marmot)                       |
+| `445`         | Group Event                     | [Marmot](marmot)                       |
 | `818`         | Merge Requests                  | [54](54.md)                            |
 | `1018`        | Poll Response                   | [88](88.md)                            |
 | `1021`        | Bid                             | [15](15.md)                            |