The paper discusses advances in fine particle control technology. Currently, the technologies of choice for controlling fine particle emissions from large combustion sources are fabric filters and electrostatic precipitators (ESPs). As these two technologies compete, advances in both technologies and their hybridization hold promise for significantly reduced fine particle emissions from both new and existing sources. Recent improvement in fabric filtration include flue gas additives and electrostatic augmentation. ESP improvements include separation and optimization of particle charging and collection, fast-rise time pulsed energization, and hybrid ESP/fabric filtration concepts. Mathematical models which allow diagnosis of problems on existing systems and optimized design of new systems are also discussed.