To initialize the Angular applications manually, follow these steps. For more information, refer to this link: https://plnkr.co/edit/iW8GzBgexjylXiq1IWtp?p=preview
<div id="AgeCalc">
<h1>Age Calculator</h1>
<div ng-app="MyModuleA" ng-controller="MyControllerA">
{{name}}
</div>
</div>
<div id="Currency Converter">
<h1>Currncy Converter</h1>
<div ng-app="MyModuleB" ng-controller="MyControllerB">
{{name}}
</div>
</div>
var moduleA = angular.module("MyModuleA", []);
moduleA.controller("MyControllerA", function($scope) { $scope.name = "Azhar"; });
var moduleB = angular.module("MyModuleB", []);
moduleB.controller("MyControllerB", function($scope) { $scope.name = "Khan";});
angular.element(document).ready(function() {
angular.bootstrap(document, ['MyModuleA','MyModuleB']);
});