SD System Co., Ltd. is a South Korea-based technology company primarily engaged in the development, manufacturing, and implementation of intelligent transportation systems, electronic toll collection systems, smart home automation networks, and integrated security solutions. Founded in 2001 and headquartered in Seongnam-si, Gyeonggi-do, South Korea, the company operates across four primary business segments: Intelligent Transportation Systems, Smart Home Solutions, Smart Parking and Security, and Specialized Electronics. The company's comprehensive product and service portfolio comprises Intelligent Transportation Systems (ITS), including roadside electronic toll collection systems (ETCS) and onboard Hi-Pass transceivers; multi-lane free-flow smart tolling platforms; freeway traffic management systems (FTMS); automated number plate recognition (ANPR) systems; vehicle detection systems (VDS); weigh-in-motion (WIM) sensors; and traffic control center management software; Smart Home and Building Automation Solutions, featuring interactive home network wall pads; video door phones; digital door lock systems; IoT home automation hubs; building energy management systems (BEMS); and intelligent LED lighting controllers; Smart Parking and Security Systems, encompassing ultrasonic and video-based parking guidance systems; automated parking barrier gates; network closed-circuit television (CCTV) cameras; biometric access control terminals; and centralized facility monitoring software; and Specialized Electronics, consisting of tactical defense communications equipment; military display consoles; and regulated power supply units. The company primarily caters to government transportation authorities, public highway operators, municipal governments, residential and commercial construction developers, and defense contractors across South Korea. In recent developments, SD System Co., Ltd. has accelerated its strategic expansion into next-generation Cooperative Intelligent Transport Systems (C-ITS) and artificial intelligence-enabled multi-lane free-flow tolling architectures to align with national expressway digital transformation projects. Furthermore, the company has broadened its smart city IoT portfolio through the rollout of cloud-integrated residential network controllers and established new supply partnerships with domestic construction firms and regional infrastructure authorities to deploy integrated smart home and urban traffic monitoring solutions.