RAM (Real Audio Media) is a flexible audio format developed by RealNetworks in 1995. Initially, it was intended to stream audio/video clips over the internet. It is designed in a way that users can listen to content while the file is still downloading. Today, many radio stations use it to broadcast content online.
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3GP is a digital media container format developed by the Third Generation Partnership Project (3GPP). It stores both audio and video streams that are transmitted via 4G, 3G, and 2G mobiles phones. Here, the video format is saved in H.264/H.253 codec, while audio is streamed in AAC-LC, HE-AAC v1, AMR-NB, AMR-WB, AMR-WB+, or Enhanced aacPlus.
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