CAIE IGCSE Economics – Microeconomic Decision Makers quick notes: money & banking (functions, characteristics, central bank), households (spending/saving/borrowing), workers (wage differentials, specialisation), and trade unions (functions, industrial action). 
Also covers firms & production (classification, size, integration, economies/diseconomies), costs/revenue/objectives, and market structures (competition vs monopoly, barriers)—built for rapid revision.