This document discusses cloud classification and types. It begins by introducing the Latin terms used to classify clouds based on their altitude and characteristics: cirrus (high), cumulus (heap), stratus (layer), and nimbus (rain-bearing). Clouds are then classified into high-level (above 6,000m), medium-level (2,000-6,000m), and low-level (below 2,000m) clouds. Various cloud types are defined within each level based on their appearance, including cirrus, altostratus, stratocumulus, cumulus, and nimbostratus clouds. The formation of precipitation within clouds and clouds' effects on radiation and vertical air transport are also summarized