Dear Colleagues and previous CHAOS Conference participants,   I hope you and your families are safe from Covid-19. Following the vaccine Covid-19 progress worldwide the 3rd stream of Abstract's Submissions deadline is set at February 28, 2021. Though the Conference is Hybrid but the probability of an excess of in-person presentations is growing. We are happy for organizing the 14th Chaotic Modeling and Simulation International Conference (CHAOS2021, 8-11 June 2021, Athens, Greece, https://5tv86.r.a.d.sendibm1.com/mk/cl/f/7rOFo3F3hIPU9CqGuVKZr9mcdHEe1NC2X9a... ). CHAOS2021 is a Hybrid Conference including in-Person and Virtual presentations to account for the Covid-19 developments. Two options of registrations are proposed https://5tv86.r.a.d.sendibm1.com/mk/cl/f/_NqCiQMiX6Sw2bIgj7yCzw8IHKDOXrUY59O...   This year (2021) we celebrate 14 years of successful CHAOS Conferences’ organization.   This is an Invitation to Participate in the conference and workshops, suggest a Plenary or Contributed Talk and to propose an Invited Session/s (3-6 talks) or a Workshop (more than 2 Sessions). Please send your Abstract and Invited Session proposals to include in the program. The Session/Workshop organizers will collect the abstracts of their Sessions/Workshops and notify the Secretariat at [ Secretariat@cmsim1.org ]( mailto:Secretariat@cmsim1.org ) Be healthy, happy and wealthy in 2021   Best regards   Prof. Christos H Skiadas CHAOS 2021 Conference Co-Chair