Photoshop :: Saving/Finding PS Actions On HD

I've recently created a set of actions that my coworkers and I commonly use at work (in TV news). However, we all use separate computers each with its own copy of PS or a network shared version.

My question is where does PS store the actions or action sets I have created on the HD and then how can I take those files and copy them to another computer. I also want to backup the actions on my home PC (i.e. save them to a disk and take them home). The only action file I can find is "default actions.atn" but I can't find any of my custom action sets. Also the only other way I can figure out how to copy and share actions is through the droplet measure, but it would be a lot easier for us to keep the process action-based (i.e. inside photoshop, not drag and drop)