I. Atmospheric Trace Gas and Exhaust Gas Analysis.- Long-path diode laser measurement of industrial air pollution.- Measurements of atmospheric HCl and NH3 with a mobile tunable diode laser system.- Atmospheric trace gas measurement on the Schauinsland surveying station.- Tunable diode laser absorption spectrometry as a reference method for tropospheric measurements.- Functional testing of a multicomponent diode laser spectrometer (DIOLA) in comparison with the conventional technology.- Dynamic car exhaust gas analysis using tunable IR diode lasers.- Measurement of trace species in the remote maritime boundary layer using TDLAS.- II. Lead Chalcogenide Diode Laser Development.- Development of lead chalcogenide lasers at Fujitsu.- Status of lead salt diode laser development at Spectra Physics.- Recent results in lead-salt laser development at the IPM.- III. Components and Techniques.- High frequency modulation spectroscopy with a lead salt diode laser.- Current status of frequency calibration tables (0 to 3000 cm?1) for tunable diode lasers from heterodyne frequency measurements.- Oxygen measurement with GaAlAs diode lasers.- Absorption spectrometry for atmospheric methane:techniques for higher sensitivity..- Computer controlled diode laser spectrometer.- An anastigmatic White cell for IR diode laser spectroscopy.- CO-laser-magnetic-resonance facility for sensitive detection of radical trace gases (NOX, HO2?).- High-sensitivity frequency modulation spectroscopy with lead-salt diode lasers..- On the adsorption properties of ammonia to various surfaces.- IV. Special Applications.- Application of tunable diode lasers to laboratory studies of atmospheric chemistry: kinetics of the reaction NO3+NO2 --> NO+NO2+O2.- Monitoring of metal oxides in low pressure flames.- Diode laser spectroscopy of transient species in electric discharges.- Diode laser application for measurements of foreign-gas broadening of v2 band in NH3.- Carbon monoxide concentrations and temperature measurements in combustion gases.- V. Photoacoustics.- Line strength measurement using optoacoustic spectroscopy.- A novel wide temperature range photoacoustic cell for molecules in the vapour phase.- Photoacoustic investigation of pesticides.- Sensitive photoacoustic trace detection of ethylene.- Photoacoustic detection of ethylene evolution in emasculated Cymbidium and Oncidium orchid flowers..- List of Participants.- Index of Authors.