The Command List is a feature in the Tekken games where the moves from each character are listed. It can accessed under the pause menu. Every Tekken game, except the original Tekken, has a Command List.
It should be noted that not all moves for each character character are listed in the command list, but the majority of them are. An example of an unlisted move is the Electric Wind Godfist, a very popular move among the Tekken community.