Default Saving Post Numbers

When Going through a forum and I come across a post that has a number on the far left on the header bar. When I click on that number It takes me right back to the post.. What I'm wondering is there a way that there is a way to save that post number some how so I can go back to it later on. Like is there a way I can keep a list on the site somewhere. I just wanted to know if it was possible somehow. I hope I explained it well

Thanks