All commands that your client sends to the server are RAW commands. PRIVMSG actually does more than just private messages. It is used for ALL messages, all actions (describe), all CTCPs, and likely some others as well. Some other RAWs are JOIN, PART, QUIT, MODE, NOTICE. You can see all the RAWs your client sends by enabling debug mode:
Type /debug off or close the @debug window to disable debug mode.
The arrows pointing to the right -> are RAWs that your client is sending to the server. The arrows pointing to the left <- show RAWs the server is sending to you.