Soltworks Co., Ltd., formerly IBKS No.4 Special Purpose Acquisition Co, is a Korea-based company principally engaged in the development and provision of defense industry software. The Company operates its business through three segments. The Virtual Training System segment provides training systems, computer based trainings (CBTs) and simulations, big data processing technologies, graphics and models creating technologies for three-dimensional (3D) image generation, training equipment and mobile platform interworking technologies and others. The Integrated Logistics Support (ILS) segment provides ILS elements development services, interactive electronic technical manuals (IERMs) and others. The Other segment provides biotoxin monitors, technical translation services, rugged notebooks and others civilian products.