Something that hasn't been brought up yet is sign language.
In New Zealand Sign Language, the sign language that I know and use, it is possible to reduce "go over to the other side of the room, pick up that suitcase, and bring it back over here to me" down to simply pointing at the suitcase, imitating picking the suitcase up by its handle, and then pointing downwards in front of oneself, all whilst looking at the interlocutor, possibly with eyebrows raised towards the end of the sentence.
To actually see it, it's a very efficient way to express not only a command but what object is desired without having to actually name it, where it should go, who should carry it out, and the eyebrows might imply that it is a request.
That said, it can be cumbersome and inefficient in many use cases; I would rather read English text when trying to quickly find a piece of information in an article than rewind or fast-forward through a video of somebody signing the article. In a real-time visual modality, though, it's very efficient.
In New Zealand Sign Language, the sign language that I know and use, it is possible to reduce "go over to the other side of the room, pick up that suitcase, and bring it back over here to me" down to simply pointing at the suitcase, imitating picking the suitcase up by its handle, and then pointing downwards in front of oneself, all whilst looking at the interlocutor, possibly with eyebrows raised towards the end of the sentence.
To actually see it, it's a very efficient way to express not only a command but what object is desired without having to actually name it, where it should go, who should carry it out, and the eyebrows might imply that it is a request.
That said, it can be cumbersome and inefficient in many use cases; I would rather read English text when trying to quickly find a piece of information in an article than rewind or fast-forward through a video of somebody signing the article. In a real-time visual modality, though, it's very efficient.