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Computer software for voice over Internet protocol (VOIP); computer software for enabling messaging and instant messaging via the Internet; computer software for use in simple message service (SMS) and multimedia message service (MMS); computer software for voice calling, voice mailing, call forwarding, video calling, video conferencing, simple message service (SMS), instant messaging, screen sharing, digital file transfer between users and user presence indication, all of the aforementioned communication functions being made available to users within one software application graphical user interface and all communications arising from such functions being transmitted via the Internet or via a peer-to-peer computer network; voice over Internet protocol (VOIP), private branch exchange (PBX), public switch telephone network (PSTN) and session initiation protocol (SIP) computer software; unified communications (UC) computer software for simultaneous voice calling, video calling, video conferencing, voice mailing, simple message service (SMS), instant messaging, screen sharing, digital file transfer between users and user presence indication, or at least two such communication functions simultaneously, all of the aforementioned communication functions being made available to users within one software application graphical user interface; providing downloadable computer software to enable voice over Internet protocol (VOIP), private branch exchange (PBX) and session initiation protocol (SIP) communications; providing downloadable computer software to enable unified communications (UC) communications, namely, simultaneous voice calling, video calling, video conferencing, voice mailing, simple message service (SMS), instant messaging, screen sharing, digital file transfer between users and user presence indication, or at least two such communication functions simultaneously, all of the aforementioned communication functions being made available to users within one software application graphical user interface. Providing voice over Internet protocol (VOIP) communications; internet telephony and video-conference services; messaging and instant messaging services via the Internet; simple message service (SMS) and multimedia message service (MMS) via a computer network; providing communications services comprising voice calling, voice mailing, call forwarding, video calling, video conferencing, simple message service (SMS), instant messaging, screen sharing, digital file transfer between users and user presence indication, all of the aforementioned communication services being made available to users within one software application graphical user interface and all provided via the Internet or via a peer-to-peer computer network; session initiation protocol (SIP), voice over Internet protocol (VOIP) and private batch exchange (PBX) communication services; voice over Internet protocol (VOIP) and public switch telephone network (PSTN) communication services, unified communications (UC) communication services, namely, services comprising simultaneous voice calling, video calling, video conferencing, voice mailing, simple message service (SMS), screen sharing, digital file transfer between users and user presence indication, or at least two such communication services simultaneously, all of the aforementioned communication services being made available to users within one software graphical user interface. Services for the design, development, installing, updating, maintenance of and providing computer software to enable voice calling, voice mailing, call forwarding, video calling, video conferencing, simple message service (SMS), instant messaging, screen sharing, digital file transfer between users and user presence indication, all of the aforementioned communication functions being made available to users within one software application graphical user interface and all communications arising from such functions being transmitted via the In … (liste kısaltıldı; tamamı TÜRKPATENT kaydında)