Consistent spelling on index page

src/docs/asciidoc/index.adoc

@@ -4,22 +4,23 @@
 
 ****
 _What's New_, _Upgrade Notes_, _Supported Versions_, and other topics,
-independent of release cadence, are maintained externaly on the project's
+independent of release cadence, are maintained externally on the project's
 https://github.com/spring-projects/spring-framework/wiki[*Github Wiki*].
 ****
 
 [horizontal]
-<<overview.adoc#overview, Overview>> :: history, design philosophy,feedback,
+<<overview.adoc#overview, Overview>> :: history, design philosophy, feedback,
 getting started.
-<<core.adoc#spring-core, Core>> :: IoC container, Events, Resources, i18n, Validation,
-Data Binding, Type Conversion, SpEL, AOP.
-<<testing.adoc#testing, Testing>> :: Mock objects, TestContext framework,
+<<core.adoc#spring-core, Core>> :: IoC Container, Events, Resources, i18n,
+Validation, Data Binding, Type Conversion, SpEL, AOP.
+<<testing.adoc#testing, Testing>> :: Mock Objects, TestContext Framework,
 Spring MVC Test, WebTestClient.
-<<data-access.adoc#spring-data-tier, Data Access>> :: Transactions, DAO support, JDBC,
-ORM, Marshalling XML.
-<<web.adoc#spring-web, Web Servlet>> :: Spring MVC, WebSocket, SockJS, STOMP messaging.
-<<web-reactive.adoc#spring-webflux, Web Reactive>> :: Spring WebFlux,
-WebClient, WebSocket.
-<<integration.adoc#spring-integration, Integration>> :: Remoting, JMS, JCA, JMX, Email,
-Tasks, Scheduling, Cache.
-<<languages.adoc#languages, Languages>> :: Kotlin, Groovy, Dynamic languages.
+<<data-access.adoc#spring-data-tier, Data Access>> :: Transactions, DAO Support,
+JDBC, O/R Mapping, XML Marshalling.
+<<web.adoc#spring-web, Web Servlet>> :: Spring MVC, WebSocket, SockJS,
+STOMP Messaging.
+<<web-reactive.adoc#spring-webflux, Web Reactive>> :: Spring WebFlux, WebClient,
+WebSocket.
+<<integration.adoc#spring-integration, Integration>> :: Remoting, JMS, JCA, JMX,
+Email, Tasks, Scheduling, Caching.
+<<languages.adoc#languages, Languages>> :: Kotlin, Groovy, Dynamic Languages.