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Viber is an instant messaging and Voice over IP (VoIP) app for smartphones developed by Viber Media. In addition to instant messaging, users can exchange images, video and audio media messages. The client software is available for Apple iOS, Android, BlackBerry OS, Nokia Series 40, Symbian, Bada, Windows Phone, Mac OS, and Microsoft Windows. A 64-bit Linux version is available in both .deb (Debian & Ubuntu) and .rpm (Fedora & openSUSE) package formats.〔(【引用サイトリンク】title=Viber for Linux PC - Viber Desktop )〕 Viber works on both 3G/4G and Wi-Fi networks. It first requires installation on a phone in order to work on a desktop operating system environment. Viber has over 100 million monthly active users from its 280 million global registered users.〔(After Rakuten acquisition, Viber reveals it has 100 million active users ). February 14, 2014. Steven Millward, Tech in Asia.〕 == History == Viber was founded by four Israeli partners: Talmon Marco, Igor Magazinnik, Sani Maroli and Ofer Smocha, with Marco as its CEO.〔(【引用サイトリンク】title=אקזיט ענק: רקוטן היפנית רוכשת את וייבר תמורת כ-900 מיליון דולר )〕 Viber was initially launched for iPhone on December 2, 2010, in direct competition with Skype. A pre-release version for Android restricted to 50,000 users appeared in May 2011; an unrestricted version was released on July 19, 2012. Viber for BlackBerry and Windows Phone devices was launched on May 8, 2012.〔(Viber for BlackBerry and Windows Phone 7 Now Available )〕 On reaching 90 million users on July 24, 2012, group messaging service and HD Voice engine were added to both Android and iPhone applications. Applications for Nokia's Series 40, Symbian and Samsung's Bada platform were also announced on the same day. Initially, the voice calling feature was only available for iPhone and Android applications, with a promise that voice would be added in upcoming versions for Bada, Symbian and Windows Phone applications, with no mention of either Series 40 or Blackberry OS. The limitation seems to lie in the core of Blackberry OS and Series 40 which does not have easy support for VoIP apps.〔(【引用サイトリンク】title=Why Viber won’t have free phone calls on Blackberry App soon )〕 On September 22, 2012, HD quality phone calls and hold group-messaging sessions were made available for Windows Phone but only for Nokia users, as part of exclusive partnership with Nokia. Viber with voice was officially released for all Windows Phone 8 devices on April 2, 2013.〔(【引用サイトリンク】title=WP8 Users Rejoice! Viber With Voice For Windows Phone 8 Has Been Released )〕 On July 24, 2013, Viber's support system was defaced by Syrian Electronic Army. According to Viber, no sensitive user information was accessed. In August 2013, Viber for Linux was released as a public beta and in August 2014 a final version.〔(【引用サイトリンク】title=Viber 4.2 Finally Released For Linux )〕 Initially, only 64-bit binaries were made available for download. On February 13, 2014, Rakuten announced they had acquired Viber for $900 million. The sale of Viber earned Israel's Shabtai family (Benny, his brother Gilad, and Gilad's son Ofer) some $500 million from their 55.2% stake in the company. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Viber」の詳細全文を読む スポンサード リンク
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