How best to create/maintain lists of items?

My site has a list of items and corresponding locations that are often updated. Right now, I'm editing the page by hand, continually changing the page content. But it's becoming rather time-consuming. I'm too new to Drupal to know exactly the best way to do this sort of thing. I can make a special content type, but I can't figure out how to display a concise list of all entries.

Basically, I need a simple way of maintaining this list of items, and displaying them in alphabetical order. (It would be nice to sort the list either by Item or Location, but I'm not going to get greedy.) I've gone through the list of custom modules, but quickly became overwhelmed with not knowing the best way to go about this little task.

My list(s) might look like:

Item #1, Location A
Item #2, Location B
...
Item #n, Location x

Ideally, I would have a simple interface to add a new item/location combo, and then a simple method for administrators to remove items (a checkbox and 'delete' button?).

Is there an existing module (or built-in functionality) that does this sort of simple organization? I suspect it can't be that hard...