Can we use SDL as document management system?

After several days study, SDL Web seems a Web site management system to me, which means we can manage and publish web site on it. Can we use it to manage documents (not web site) such as word, ppt, images, audios and so on? Here manage meas upload, download, versioning and so on. If SDL Web can not do this, is there any other products of SDL can support such functions?

Thanks,

Jiang Chuan.