Most of the principal airborne cloud-physics projects during the ten-year period 1974–1984 are documented to provide selected information on the type and quantity of microphysical data that have been collected. The emphasis is on measurements above the melting level where over 2100 flights from 55 different projects have taken place. Most (1825) flights are from the United States and Canada, but 319 are from various locations around the world. The number of flights with data on liquid-water content, droplet sizes, ice particles, snow, and other hydrometeors are tabulated.