L: Clothing – Textiles – Machines and accessoriesD: Building – Architecture – Civil Engineering – Construction – Materials – WoodworksM: Medicine – Surgery – Orthopaedics – Material for disabledF: Security – Rescue – AlarmC: Electronics – Electricity – Methods of communication – Electrical networkA: Mechanics – Engines – Machinery – Tools – Industrial processes – MetallurgyW: Hardware – Software – Cybersecurity – Blockchain – Internet of things (IoT)V: Protection of the environment – RecyclingQ: Foodstuffs – Drinks – Cosmetics – Paramedical – Health – HygieneH: Furnishing – Interior architectureU: Games – Toys