C: Electronics – Electricity – Methods of communication – Electrical networkA: Mechanics – Engines – Machinery – Tools – Industrial processes – MetallurgyQ: Foodstuffs – Drinks – Cosmetics – Paramedical – Health – HygieneF: Security – Rescue – AlarmI: Domestic science – Restaurant equipmentD: Building – Architecture – Civil Engineering – Construction – Materials – WoodworksZ: Energy – Renewable and green energyO: Teaching methods and materials – Musical Instruments – Art materials