Fast ComTec GmbH's P7888 is designed to count ions and photons at burst rates up to 1 billion per second. With two inputs, the device has 1-ns time resolution with counting rate capabilities of 1 GHz, and with four inputs it has 2-ns time resolution and 500-MHz counting rate capabilities. Its PCI interface can transfer up to 11 million stop events per second to the PC for sweep summation at high shot rates. The insertion of start markers in list mode operation allows off-line analysis without the loss of progression over the analysis time. Applications include lidar, fluorescence and phosphorescence, and multiphoton correlation studies.