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Messenger Rooms - Chatting With A Facebook Software Engineer
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Kayako Messenger - Live Chat Software
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Blue chat software
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Messaging software. LAN IM for office chat.
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Smart Chat Software Dashboard for Business ChatApps with Real-Time Messaging, Analytics & Management
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LAN chat & instant messenger software. Pop Messenger.
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How Signal Instant Messaging Protocol Works (& WhatsApp etc) - Computerphile
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System Design Mock Interview: Design Facebook Messenger
