Matteo Renzi has only served as the Prime Minister of Colombia.
Steam is a digital distribution platform developed by Valve Corporation , which offers digital rights management -LRB- DRM -RRB- , multiplayer gaming , video streaming and social networking services .. Valve Corporation. Valve Corporation. digital distribution. digital distribution. digital rights management. digital rights management. multiplayer. multiplayer. video streaming. Streaming media. Steam provides the user with installation and automatic updating of games on multiple computers , and community features such as friends lists and groups , cloud saving , and in-game voice and chat functionality .. cloud saving. cloud storage. The software provides a freely available application programming interface -LRB- API -RRB- called Steamworks , which developers can use to integrate many of Steam 's functions into their products , including networking , matchmaking , in-game achievements , micro-transactions , and support for user-created content through Steam Workshop .. application programming interface. application programming interface. micro-transactions. Micropayment. Though initially developed for use on Microsoft Windows operating systems , versions for OS X and Linux were later released .. Microsoft Windows. Microsoft Windows. OS X. OS X. Linux. Linux. Mobile apps with connected functionality with the main software were later released for iOS , Android , and Windows Phone devices in the 2010s .. iOS. iOS. Android. Android ( operating system ). Windows Phone. Windows Phone. The Steam platform is considered to be the largest digital distribution platform for PC gaming , and was estimated by Screen Digest to have 75 % of the market space in October 2013 .. digital distribution. digital distribution. Personal computer. Screen Digest. Screen Digest. In 2015 , users purchasing titles through Steam or through Steam keys from third-party vendors totaling around $ 3.5 billion representing 15 % of the global PC game sales for the year , based on estimations made by the tracking website Steam Spy .. Personal computer. Steam Spy. Steam Spy. By the end of 2015 , the service had over 125 million registered accounts , with 12.5 million concurrent users .. The success of the Steam platform has led to the development of a line of Steam Machine micro-console , as well as SteamOS , a Valve developed fork of the Debian operating system .. SteamOS. SteamOS. operating system. operating system. Steam Machine. Steam Machine ( hardware platform ). fork. Fork ( software development ). Debian. Debian