The purpose of the 12th International Conference on Web Information Systems and Technologies (WEBIST) is to bring together researchers, engineers and practitioners interested in the technological advances and business applications of web-based information systems. The conference has five main tracks, covering different aspects of Web Information Systems, including Internet Technology, Web Interfaces and Applications, Society, e-Communities, e-Business, Web Intelligence and Mobile Information Systems. WEBIST 2016 will be held in conjunction with CSEDU 2016, SMARTGREENS 2016, CLOSER 2016, VEHITS 2016 and IoTBD 2016. CONFERENCE AREAS: Each of these topic areas is expanded below but the sub-topics list is not exhaustive. Papers may address one or more of the listed sub-topics, although authors should not feel limited by them. Unlisted but related sub-topics are also acceptable, provided they fit in one of the following main topic areas: 1. INTERNET TECHNOLOGY 2. SERVICE BASED INFORMATION SYSTEMS 3. WEB INTERFACES 4. WEB INTELLIGENCE 5. MOBILE INFORMATION SYSTEMS