Giới thiệu Copyright © 2009–2013\n\nCreated by serso aka se.solovyev\n\n We are on Facebook: http://facebook.com/calculatorpp\n\n This program is distributed under Apache 2.0 License:\nsource code can be found on\n http://github.com\n\n For more information please\ncontact the author by email\n se.solovyev@gmail.com \nor visit\nhttp://se.solovyev.org\n\n If you want to support the project\nyou can buy a special option from application preferences\n\n If you like the application\nrate it with 5 stars on\n Google Play\n\n This application uses next open source libraries:\n Simple (XML serialization)\n JSCL Ứng dụng này được dịch sang tiếng Anh bởi: Sergey Solovyev Ghi chú phát hành "Ghi chú phát hành cho phiên bản " http://www.facebook.com/calculatorpp