diff --git a/src/main/java/rx/annotations/Beta.java b/src/main/java/rx/annotations/Beta.java
new file mode 100644
index 0000000000..0a117d6d84
--- /dev/null
+++ b/src/main/java/rx/annotations/Beta.java
@@ -0,0 +1,51 @@
+package rx.annotations;
+
+/*
+ * Copyright (C) 2010 The Guava Authors
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * 
+ * Originally from https://code.google.com/p/guava-libraries/source/browse/guava/src/com/google/common/annotations/Beta.java
+ */
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * Signifies that a public API (public class, method or field) is subject to
+ * incompatible changes, or even removal, in a future release. An API bearing
+ * this annotation is exempt from any compatibility guarantees made by its
+ * containing library. Note that the presence of this annotation implies nothing
+ * about the quality or performance of the API in question, only the fact that
+ * it is not "API-frozen."
+ *
+ * <p>It is generally safe for <i>applications</i> to depend on beta APIs, at
+ * the cost of some extra work during upgrades. However it is generally
+ * inadvisable for <i>libraries</i> (which get included on users' CLASSPATHs,
+ * outside the library developers' control) to do so.
+ *
+ **/
+@Retention(RetentionPolicy.CLASS)
+@Target({
+        ElementType.ANNOTATION_TYPE,
+        ElementType.CONSTRUCTOR,
+        ElementType.FIELD,
+        ElementType.METHOD,
+        ElementType.TYPE })
+@Documented
+@Beta
+public @interface Beta {
+}
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diff --git a/src/main/java/rx/annotations/Experimental.java b/src/main/java/rx/annotations/Experimental.java
new file mode 100644
index 0000000000..52619a56a7
--- /dev/null
+++ b/src/main/java/rx/annotations/Experimental.java
@@ -0,0 +1,41 @@
+package rx.annotations;
+
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * 
+ * Inspired from https://code.google.com/p/guava-libraries/source/browse/guava/src/com/google/common/annotations/Beta.java
+ */
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * Signifies that a public API (public class, method or field) is will almost certainly
+ * be changed or removed in a future release. An API bearing this annotation should not 
+ * be used or relied upon in production code. APIs exposed with this annotation exist
+ * to allow broad testing and feedback on experimental features.  
+ **/
+@Retention(RetentionPolicy.CLASS)
+@Target({
+        ElementType.ANNOTATION_TYPE,
+        ElementType.CONSTRUCTOR,
+        ElementType.FIELD,
+        ElementType.METHOD,
+        ElementType.TYPE })
+@Documented
+@Experimental
+public @interface Experimental {
+}
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