diff --git a/src/com/android/settings/accounts/AccountSyncSettings.java b/src/com/android/settings/accounts/AccountSyncSettings.java
index a56dc94c2a3..23b6157c97d 100644
--- a/src/com/android/settings/accounts/AccountSyncSettings.java
+++ b/src/com/android/settings/accounts/AccountSyncSettings.java
@@ -294,7 +294,7 @@ public class AccountSyncSettings extends AccountPreferenceBase {
                     }
                     // if we're enabling sync, this will request a sync as well
                     ContentResolver.setSyncAutomaticallyAsUser(account, authority, syncOn, userId);
-                    // if the master sync switch is off, the request above will
+                    // if the primary sync switch is off, the request above will
                     // get dropped.  when the user clicks on this toggle,
                     // we want to force the sync, however.
                     if (!ContentResolver.getMasterSyncAutomaticallyAsUser(userId) || !syncOn) {
diff --git a/src/com/android/settings/development/DefaultLaunchPreferenceController.java b/src/com/android/settings/development/DefaultLaunchPreferenceController.java
index e76dbebf42b..c0dcb7a51ca 100644
--- a/src/com/android/settings/development/DefaultLaunchPreferenceController.java
+++ b/src/com/android/settings/development/DefaultLaunchPreferenceController.java
@@ -24,7 +24,7 @@ import com.android.settingslib.development.DeveloperOptionsPreferenceController;
 /**
  * This controller is used for preference that has fragment or launch intent defined in the
  * preference xml, and do not need any handling to update the preference state, except when the
- * master developer options switch is turned on/off, the preference needs to be enabled/disabled.
+ * primary developer options switch is turned on/off, the preference needs to be enabled/disabled.
  *
  */
 public class DefaultLaunchPreferenceController extends DeveloperOptionsPreferenceController
diff --git a/src/com/android/settings/development/DevelopmentSettingsDashboardFragment.java b/src/com/android/settings/development/DevelopmentSettingsDashboardFragment.java
index f2d60f19814..a3d0c469d46 100644
--- a/src/com/android/settings/development/DevelopmentSettingsDashboardFragment.java
+++ b/src/com/android/settings/development/DevelopmentSettingsDashboardFragment.java
@@ -189,7 +189,7 @@ public class DevelopmentSettingsDashboardFragment extends RestrictedDashboardFra
             getPreferenceScreen().removeAll();
             return;
         }
-        // Set up master switch
+        // Set up primary switch
         mSwitchBar = ((SettingsActivity) getActivity()).getSwitchBar();
         mSwitchBarController = new DevelopmentSwitchBarController(
                 this /* DevelopmentSettings */, mSwitchBar, mIsAvailable,
diff --git a/src/com/android/settings/development/WirelessDebuggingPreferenceController.java b/src/com/android/settings/development/WirelessDebuggingPreferenceController.java
index 369a0c88604..592028ce544 100644
--- a/src/com/android/settings/development/WirelessDebuggingPreferenceController.java
+++ b/src/com/android/settings/development/WirelessDebuggingPreferenceController.java
@@ -43,7 +43,7 @@ import com.android.settingslib.core.lifecycle.events.OnResume;
 import com.android.settingslib.development.DeveloperOptionsPreferenceController;
 
 /**
- * This controls the master switch controller in the developer options page for
+ * This controls the primary switch controller in the developer options page for
  * "Wireless debugging".
  */
 public class WirelessDebuggingPreferenceController extends DeveloperOptionsPreferenceController
diff --git a/src/com/android/settings/location/LocationEnabler.java b/src/com/android/settings/location/LocationEnabler.java
index db5397330e1..ab59b8eedfa 100644
--- a/src/com/android/settings/location/LocationEnabler.java
+++ b/src/com/android/settings/location/LocationEnabler.java
@@ -109,7 +109,7 @@ public class LocationEnabler implements LifecycleObserver, OnStart, OnStop {
 
         if (isRestricted()) {
             // Location toggling disabled by user restriction. Read the current location mode to
-            // update the location master switch.
+            // update the location primary switch.
             if (Log.isLoggable(TAG, Log.INFO)) {
                 Log.i(TAG, "Restricted user, not setting location mode");
             }
diff --git a/src/com/android/settings/location/LocationSettings.java b/src/com/android/settings/location/LocationSettings.java
index 26a4afdc7c6..a9aa9a3fe3a 100644
--- a/src/com/android/settings/location/LocationSettings.java
+++ b/src/com/android/settings/location/LocationSettings.java
@@ -41,7 +41,7 @@ import java.util.List;
  * <ul>
  *     <li>Platform location controls</li>
  *     <ul>
- *         <li>In switch bar: location master switch. Used to toggle location on and off.
+ *         <li>In switch bar: location primary switch. Used to toggle location on and off.
  *         </li>
  *     </ul>
  *     <li>Recent location requests: automatically populated by {@link RecentLocationApps}</li>
diff --git a/src/com/android/settings/location/LocationSwitchBarController.java b/src/com/android/settings/location/LocationSwitchBarController.java
index 7aa66ce2049..e8458d1b31c 100644
--- a/src/com/android/settings/location/LocationSwitchBarController.java
+++ b/src/com/android/settings/location/LocationSwitchBarController.java
@@ -60,9 +60,9 @@ public class LocationSwitchBarController implements SwitchBar.OnSwitchChangeList
 
     @Override
     public void onLocationModeChanged(int mode, boolean restricted) {
-        // Restricted user can't change the location mode, so disable the master switch. But in some
-        // corner cases, the location might still be enabled. In such case the master switch should
-        // be disabled but checked.
+        // Restricted user can't change the location mode, so disable the primary switch. But in
+        // some corner cases, the location might still be enabled. In such case the primary switch
+        // should be disabled but checked.
         final boolean enabled = mLocationEnabler.isEnabled(mode);
         final int userId = UserHandle.myUserId();
         final RestrictedLockUtils.EnforcedAdmin admin =
@@ -90,7 +90,7 @@ public class LocationSwitchBarController implements SwitchBar.OnSwitchChangeList
     }
 
     /**
-     * Listens to the state change of the location master switch.
+     * Listens to the state change of the location primary switch.
      */
     @Override
     public void onSwitchChanged(Switch switchView, boolean isChecked) {
diff --git a/src/com/android/settings/users/AppRestrictionsFragment.java b/src/com/android/settings/users/AppRestrictionsFragment.java
index 9f6a2b656de..a835a4e5bcd 100644
--- a/src/com/android/settings/users/AppRestrictionsFragment.java
+++ b/src/com/android/settings/users/AppRestrictionsFragment.java
@@ -406,7 +406,7 @@ public class AppRestrictionsFragment extends SettingsPreferenceFragment implemen
                 // Get and populate the defaults, since the user is not going to be
                 // able to toggle this app ON (it's ON by default and immutable).
                 // Only do this for restricted profiles, not single-user restrictions
-                // Also don't do this for slave icons
+                // Also don't do this for secondary icons
                 if (app.masterEntry == null) {
                     requestRestrictionsForApp(packageName, p, false);
                 }
@@ -432,9 +432,9 @@ public class AppRestrictionsFragment extends SettingsPreferenceFragment implemen
 
     private String getPackageSummary(PackageInfo pi, AppRestrictionsHelper.SelectableAppInfo app) {
         // Check for 3 cases:
-        // - Slave entry that can see primary user accounts
-        // - Slave entry that cannot see primary user accounts
-        // - Master entry that can see primary user accounts
+        // - Secondary entry that can see primary user accounts
+        // - Secondary entry that cannot see primary user accounts
+        // - Primary entry that can see primary user accounts
         // Otherwise no summary is returned
         if (app.masterEntry != null) {
             if (mRestrictedProfile && pi.restrictedAccountType != null) {