[guide] Add notes on acronyms and initialisms to naming

Author: kesne

README.md

@@ -2761,6 +2761,36 @@ Other Style Guides
     export default AirbnbStyleGuide;
     ```
 
+  <a name="naming--Acronyms-and-Initialisms"></a>
+  - [22.9](#naming--Acronyms-and-Initialisms) Acronyms and initialisms should always be all capitalized, or all lowercased.
+
+    > Why? Names are for readability, not to appease a computer algorithm.
+
+    ```javascript
+    // bad
+    import SmsContainer from './containers/SmsContainer';
+
+    // bad
+    const HttpRequests = [
+      // ...
+    ];
+
+    // good
+    import SMSContainer from './containers/SMSContainer';
+
+    // good
+    const HTTPRequests = [
+      // ...
+    ];
+
+    // best
+    import TextMessageContainer from './containers/TextMessageContainer';
+
+    // best
+    const Requests = [
+      // ...
+    ];
+    ```
 
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