diff --git a/spec/helpers/test-helper.ts b/spec/helpers/test-helper.ts
index 753756a181..661f39a511 100644
--- a/spec/helpers/test-helper.ts
+++ b/spec/helpers/test-helper.ts
@@ -3,7 +3,7 @@ declare const global: any;
 import * as Rx from '../../src/Rx';
 import { ObservableInput } from '../../src/Observable';
 import { root } from '../../src/util/root';
-import { $$iterator } from '../../src/symbol/iterator';
+import { $$iterator } from '../../src/internal/symbol/iterator';
 import $$symbolObservable from 'symbol-observable';
 
 export function lowerCaseO<T>(...args: Array<any>): Rx.Observable<T> {
diff --git a/spec/symbol/iterator-spec.ts b/spec/symbol/iterator-spec.ts
index d1f0bbfaa9..e8cd128fec 100644
--- a/spec/symbol/iterator-spec.ts
+++ b/spec/symbol/iterator-spec.ts
@@ -1,5 +1,5 @@
 import { expect } from 'chai';
-import { $$iterator, symbolIteratorPonyfill } from '../../src/symbol/iterator';
+import { $$iterator, symbolIteratorPonyfill } from '../../src/internal/symbol/iterator';
 
 describe('iterator symbol', () => {
   it('should exist', () => {
@@ -97,4 +97,4 @@ describe('symbolIteratorPonyfill', () => {
       });
     });
   });
-});
\ No newline at end of file
+});
diff --git a/spec/symbol/observable-polyfilled-spec.ts b/spec/symbol/observable-polyfilled-spec.ts
index c6dfa7bbf9..79891d3b5f 100644
--- a/spec/symbol/observable-polyfilled-spec.ts
+++ b/spec/symbol/observable-polyfilled-spec.ts
@@ -1,6 +1,6 @@
 import { expect } from 'chai';
 
-import { getSymbolObservable } from '../../src/symbol/observable';
+import { getSymbolObservable } from '../../src/internal/symbol/observable';
 
 describe('observable symbol', () => {
   it('should exist in the proper form when Symbol does not exist', () => {
diff --git a/spec/symbol/observable-spec.ts b/spec/symbol/observable-spec.ts
index 6c2d502b77..d9b771e22b 100644
--- a/spec/symbol/observable-spec.ts
+++ b/spec/symbol/observable-spec.ts
@@ -2,7 +2,7 @@ import { expect } from 'chai';
 import $$symbolObservable from 'symbol-observable';
 
 import { root } from '../../src/util/root';
-import { getSymbolObservable } from '../../src/symbol/observable';
+import { getSymbolObservable } from '../../src/internal/symbol/observable';
 
 describe('observable symbol', () => {
   it('should exist in the proper form', () => {
diff --git a/spec/symbol/rxSubscriber-spec.ts b/spec/symbol/rxSubscriber-spec.ts
index b5e793be0d..61fd23122c 100644
--- a/spec/symbol/rxSubscriber-spec.ts
+++ b/spec/symbol/rxSubscriber-spec.ts
@@ -1,6 +1,6 @@
 import { expect } from 'chai';
 import { root } from '../../src/util/root';
-import {$$rxSubscriber} from '../../src/symbol/rxSubscriber';
+import {$$rxSubscriber} from '../../src/internal/symbol/rxSubscriber';
 
 describe('rxSubscriber symbol', () => {
   it('should exist in the proper form', () => {
diff --git a/spec/util/subscribeToResult-spec.ts b/spec/util/subscribeToResult-spec.ts
index 8bd30b3cff..34d24edafa 100644
--- a/spec/util/subscribeToResult-spec.ts
+++ b/spec/util/subscribeToResult-spec.ts
@@ -2,7 +2,7 @@ import { expect } from 'chai';
 import * as Rx from '../../src/Rx';
 import { subscribeToResult } from '../../src/util/subscribeToResult';
 import { OuterSubscriber } from '../../src/internal/OuterSubscriber';
-import { $$iterator } from '../../src/symbol/iterator';
+import { $$iterator } from '../../src/internal/symbol/iterator';
 import $$symbolObservable from 'symbol-observable';
 
 describe('subscribeToResult', () => {
diff --git a/src/Rx.ts b/src/Rx.ts
index 0af5094aa5..ef1b85d8c2 100644
--- a/src/Rx.ts
+++ b/src/Rx.ts
@@ -172,9 +172,9 @@ import { AsapScheduler } from './internal/scheduler/AsapScheduler';
 import { AsyncScheduler } from './internal/scheduler/AsyncScheduler';
 import { QueueScheduler } from './internal/scheduler/QueueScheduler';
 import { AnimationFrameScheduler } from './internal/scheduler/AnimationFrameScheduler';
-import { rxSubscriber } from './symbol/rxSubscriber';
-import { iterator } from './symbol/iterator';
-import { observable } from './symbol/observable';
+import { rxSubscriber } from './internal/symbol/rxSubscriber';
+import { iterator } from './internal/symbol/iterator';
+import { observable } from './internal/symbol/observable';
 
 import * as _operators from './internal/operators';
 
diff --git a/src/internal/Observable.ts b/src/internal/Observable.ts
index 7b1cf32d0c..a181448450 100644
--- a/src/internal/Observable.ts
+++ b/src/internal/Observable.ts
@@ -6,7 +6,7 @@ import { root } from '../util/root';
 import { toSubscriber } from '../util/toSubscriber';
 import { IfObservable } from './observable/IfObservable';
 import { ErrorObservable } from './observable/ErrorObservable';
-import { observable as Symbol_observable } from '../symbol/observable';
+import { observable as Symbol_observable } from '../internal/symbol/observable';
 import { OperatorFunction } from '../interfaces';
 import { pipeFromArray } from '../util/pipe';
 
diff --git a/src/internal/Subject.ts b/src/internal/Subject.ts
index f71f198a78..8e35b55c28 100644
--- a/src/internal/Subject.ts
+++ b/src/internal/Subject.ts
@@ -5,7 +5,7 @@ import { Subscriber } from './Subscriber';
 import { ISubscription, Subscription, TeardownLogic } from './Subscription';
 import { ObjectUnsubscribedError } from '../util/ObjectUnsubscribedError';
 import { SubjectSubscription } from './SubjectSubscription';
-import { rxSubscriber as rxSubscriberSymbol } from '../symbol/rxSubscriber';
+import { rxSubscriber as rxSubscriberSymbol } from '../internal/symbol/rxSubscriber';
 
 /**
  * @class SubjectSubscriber<T>
diff --git a/src/internal/Subscriber.ts b/src/internal/Subscriber.ts
index d6653e9034..4077c1bc2e 100644
--- a/src/internal/Subscriber.ts
+++ b/src/internal/Subscriber.ts
@@ -1,7 +1,7 @@
 import { isFunction } from '../util/isFunction';
 import { Observer, PartialObserver, empty as emptyObserver } from './Observer';
 import { Subscription } from './Subscription';
-import { rxSubscriber as rxSubscriberSymbol } from '../symbol/rxSubscriber';
+import { rxSubscriber as rxSubscriberSymbol } from '../internal/symbol/rxSubscriber';
 
 /**
  * Implements the {@link Observer} interface and extends the
diff --git a/src/internal/observable/FromObservable.ts b/src/internal/observable/FromObservable.ts
index f95f8c4ffd..ea0ff112b9 100644
--- a/src/internal/observable/FromObservable.ts
+++ b/src/internal/observable/FromObservable.ts
@@ -7,11 +7,11 @@ import { ArrayObservable } from './ArrayObservable';
 import { ArrayLikeObservable } from './ArrayLikeObservable';
 
 import { IScheduler } from '../Scheduler';
-import { iterator as Symbol_iterator } from '../../symbol/iterator';
+import { iterator as Symbol_iterator } from '../../internal/symbol/iterator';
 import { Observable, ObservableInput } from '../Observable';
 import { Subscriber } from '../Subscriber';
 import { ObserveOnSubscriber } from '../../internal/operators/observeOn';
-import { observable as Symbol_observable } from '../../symbol/observable';
+import { observable as Symbol_observable } from '../../internal/symbol/observable';
 
 /**
  * We need this JSDoc comment for affecting ESDoc.
diff --git a/src/internal/observable/IteratorObservable.ts b/src/internal/observable/IteratorObservable.ts
index cf9b6c213f..08b7283df8 100644
--- a/src/internal/observable/IteratorObservable.ts
+++ b/src/internal/observable/IteratorObservable.ts
@@ -1,7 +1,7 @@
 import { root } from '../../util/root';
 import { IScheduler } from '../Scheduler';
 import { Observable } from '../Observable';
-import { iterator as Symbol_iterator } from '../../symbol/iterator';
+import { iterator as Symbol_iterator } from '../../internal/symbol/iterator';
 import { TeardownLogic } from '../Subscription';
 import { Subscriber } from '../Subscriber';
 
diff --git a/src/internal/observable/zip.ts b/src/internal/observable/zip.ts
index 8024a8f254..6605ac302f 100644
--- a/src/internal/observable/zip.ts
+++ b/src/internal/observable/zip.ts
@@ -7,7 +7,7 @@ import { Subscriber } from '../Subscriber';
 import { OuterSubscriber } from '../OuterSubscriber';
 import { InnerSubscriber } from '../InnerSubscriber';
 import { subscribeToResult } from '../../util/subscribeToResult';
-import { iterator as Symbol_iterator } from '../../symbol/iterator';
+import { iterator as Symbol_iterator } from '../../internal/symbol/iterator';
 
 /* tslint:disable:max-line-length */
 export function zip<T, R>(v1: ObservableInput<T>, project: (v1: T) => R): Observable<R>;
diff --git a/src/symbol/iterator.ts b/src/internal/symbol/iterator.ts
similarity index 96%
rename from src/symbol/iterator.ts
rename to src/internal/symbol/iterator.ts
index cdee34a606..be4e1c762f 100644
--- a/src/symbol/iterator.ts
+++ b/src/internal/symbol/iterator.ts
@@ -1,4 +1,4 @@
-import { root } from '../util/root';
+import { root } from '../../util/root';
 
 export function symbolIteratorPonyfill(root: any) {
   const Symbol: any = root.Symbol;
diff --git a/src/symbol/observable.ts b/src/internal/symbol/observable.ts
similarity index 93%
rename from src/symbol/observable.ts
rename to src/internal/symbol/observable.ts
index 06c2bfb556..38ae16f004 100644
--- a/src/symbol/observable.ts
+++ b/src/internal/symbol/observable.ts
@@ -1,4 +1,4 @@
-import { root } from '../util/root';
+import { root } from '../../util/root';
 
 export function getSymbolObservable(context: any) {
   let $$observable: any;
diff --git a/src/symbol/rxSubscriber.ts b/src/internal/symbol/rxSubscriber.ts
similarity index 87%
rename from src/symbol/rxSubscriber.ts
rename to src/internal/symbol/rxSubscriber.ts
index 693d0a9881..df11d3b93d 100644
--- a/src/symbol/rxSubscriber.ts
+++ b/src/internal/symbol/rxSubscriber.ts
@@ -1,4 +1,4 @@
-import { root } from '../util/root';
+import { root } from '../../util/root';
 
 const Symbol: any = root.Symbol;
 
diff --git a/src/util/subscribeToResult.ts b/src/util/subscribeToResult.ts
index 82635f552d..2b16c36288 100644
--- a/src/util/subscribeToResult.ts
+++ b/src/util/subscribeToResult.ts
@@ -4,11 +4,11 @@ import { isPromise } from './isPromise';
 import { isObject } from './isObject';
 import { Subscriber } from '../internal/Subscriber';
 import { Observable, ObservableInput } from '../internal/Observable';
-import { iterator as Symbol_iterator } from '../symbol/iterator';
+import { iterator as Symbol_iterator } from '../internal/symbol/iterator';
 import { Subscription } from '../internal/Subscription';
 import { InnerSubscriber } from '../internal/InnerSubscriber';
 import { OuterSubscriber } from '../internal/OuterSubscriber';
-import { observable as Symbol_observable } from '../symbol/observable';
+import { observable as Symbol_observable } from '../internal/symbol/observable';
 
 export function subscribeToResult<T, R>(outerSubscriber: OuterSubscriber<T, R>,
                                         result: any,
diff --git a/src/util/toSubscriber.ts b/src/util/toSubscriber.ts
index 1fef6d2ae0..5a1d0b7c51 100644
--- a/src/util/toSubscriber.ts
+++ b/src/util/toSubscriber.ts
@@ -1,5 +1,5 @@
 import { Subscriber } from '../internal/Subscriber';
-import { rxSubscriber as rxSubscriberSymbol } from '../symbol/rxSubscriber';
+import { rxSubscriber as rxSubscriberSymbol } from '../internal/symbol/rxSubscriber';
 import { PartialObserver, empty as emptyObserver } from '../internal/Observer';
 
 export function toSubscriber<T>(